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Crime Scene Unit Crime Scene Case Records

Evidence Collection Division

Crime Scene Unit Crime Scene Case Records Evidence Collection Division

1. Crime Scene Case Records

1.1. Scope

1.1.1. The purpose of this section is to provide guidelines on generating crime scene field notes, reports, case record requirements, and administrative and technical reviews.

1.2. Case Record 1.2.1. A case record consists of the following items:

1.2.1.1. Case file cover form 1.2.1.2. Case file checklist 1.2.1.3. LIMS Barcode page 1.2.1.4. Technical Review Form (If applicable) 1.2.1.5. Final report(s) and other supplement reports (If applicable) 1.2.1.6. Field/Scene Notes 1.2.1.7. All copies of crime scene photos are stored in Dataworks when HPD is the

requesting agency. For other requesting agencies, the photos are maintained in the HFSC equivalent. A DVD of the photographs may be provided to outside agencies as needed.

1.2.2. Other items that may be included in the case record if applicable include: 1.2.2.1. Copies of rough sketches and completed sketches (when made) 1.2.2.2. A case jacket or folder with applicable bar code stickers. 1.2.2.3. Copies of requesting agencies’ property forms 1.2.2.4. Copies of warrants 1.2.2.5. Autopsy/medical records 1.2.2.6. Witness statements that aid in the collection of evidence 1.2.2.7. Copies of video recordings 1.2.2.8. Miscellaneous papers, copies, notes, or other items helpful during case preparation

or courtroom testimony included at the discretion of the CSI.

1.3. Case File Cover Form 1.3.1. All case records will contain a cover page form and, depending on the type of processing

performed, may contain the following information: 1.3.1.1. Requesting Agency’s Case Number 1.3.1.2. Houston Forensic Science Center’s Forensic Case Number (FCN) 1.3.1.3. Offense (If known) 1.3.1.4. Date of Offense or Investigation 1.3.1.5. Location 1.3.1.6. Identity of Investigator(s)

Crime Scene Case Records ECD-CSU-CSCR Issued By: ECD Acting Director Issue Date: 12/07/2015 Uncontrolled When Printed of 8


1.3.1.7. Employee Number

1.4. Case File Checklist Form 1.4.1. All case records will contain the most current Case File Checklist form. The purpose of the

checklist is to allow a CSI to denote what is contained within the case record and the total number of pages in each section. This checklist can note the following:

1.4.1.1. Report(s) 1.4.1.2. Diagram(s) 1.4.1.3. Forms 1.4.1.4. VEB Documents 1.4.1.5. Scene DVD 1.4.1.6. Field/Scene Notes 1.4.1.7. Miscellaneous 1.4.1.8. Notes

1.4.2. The CSU Cover Page, the Case File Checklist form and the LIMS Barcode page will be placed at the beginning of the case record with the cover page being first.

1.5. Reports 1.5.1. A report must be generated for every request for service by the assigned CSI when

investigative action is taken. If more than one CSI responds to a scene, the primary CSI will write the primary report and all others may write other reports to supplement the primary report.

1.5.2. The standard format for reports by the primary CSI may include the following sections in order: Introduction, Scene Summary, the CSU Functions, and a Disposition section.

1.5.2.1. Introduction section: Should contain a summary of the date, time, and location of the crime scene. Other officers present at the crime scene might be listed along with other representatives or interviewed witnesses.

1.5.2.2. Scene Summary section: Should contain a narrative describing the crime scene(s) and any other pertinent information such as the CSI’s observations, vehicle descriptions, etc.

1.5.2.3. CSU Functions section: Should contain a description of the actions taken, equipment used, the items of evidence collected and how they were processed. The total number of photographs taken for the crime scene should also be included in this section. Other relevant information that may be included are the results of screening tests, search technique used, trajectory and bloodstain pattern analysis, and fingerprint processing. For fingerprint processing conducted at the scene, the report will include a description of what was processed and the results of the processing.



1.5.2.4. Disposition section: Should contain a description of the specific piece of evidence, where it was recovered and where it was tagged into evidence.

1.5.3. Supplemental reports may be authored in addition to the primary report when more than one investigator processes a crime scene. The supplemental secondary report shall indicate the secondary investigators role, narrating what duties they performed at the scene.

1.5.4. Other instances where supplemental reports are written may include: follow up processing to the original crime scene; processing of subsequent or additional related scenes (processing of suspects and/or vehicles at the VEB); or any other involvement related to the original requesting agency case number.

1.5.5. The total number of pages for LIMS and RMS reports should be denoted in the Case File Checklist Form.

1.6. Report Modifications 1.6.1. It is sometimes necessary to modify a LIMS report after it has been issued. This may be

necessary to correct an error in the LIMS report, to document additional information conducted after the issuance of the report, at the request of the DA’s office, or for various other reasons.

1.6.2. If it becomes necessary to amend a signed report, then the amended report will be clearly identified, will contain a reference to the original report that it is amending, and will clearly state why an amended report was issued. The original report must be maintained within the case record.

1.6.2.1. Suggested report modification language includes: 1.6.2.1.1. “This report amends Report #: (Amended report) to include the following

corrections and/or additions.” 1.6.2.1.2. “Supplement to Report #: (Amended report), amended due to the following

corrections and/or additions.”

1.7. Diagram/Sketches 1.7.1. This section of the case record is designated for any formal sketch created from a rough

sketch. (Sketches are typically required for homicide, officer-involved shootings, and when requested by the requesting agency.) This section can also contain aerial or satellite maps used to represent large areas.

1.8. Forms 1.8.1. This section of the case record is designated for copies or additional printouts of

submitted forms such as the Property Room submission form, copies of search warrants,



consents to search, SEM Gunshot Residue kit forms, Narcotics forms, etc. and are kept along with the case file in the event that the original form is lost, destroyed, etc.

1.9. Field Notes 1.9.1. When processing a crime scene, notes should be taken contemporaneously with scene

processing. These legibly written notes could include the crime scene responder’s observations, search and screening techniques used, list of evidence collected, and any other pertinent information regarding the crime scene.

1.9.1.1. Forms listed in QMS for the Crime Scene Unit may be used to capture all scene related notes information.

1.9.2. Information recorded on notes and other forms may include but is not limited to the following information:

1.9.2.1. Date and time of call received 1.9.2.2. Time arrived on scene 1.9.2.3. Primary unit, investigators, and/or other personnel 1.9.2.4. Requesting agency’s case number 1.9.2.5. Location of crime scene 1.9.2.6. Weather/Environment 1.9.2.7. Initial observations/briefing notes 1.9.2.8. Victim’s, suspect’s and witness names (If available) 1.9.2.9. Search method used (If applicable) 1.9.2.10. Screening testing results (If applicable) 1.9.2.11. Evidence inventory of items collected 1.9.2.12. Overall condition of area 1.9.2.13. Any other pertinent information regarding the crime scene

1.9.3. Field Scene notes are to be preserved and submitted with the completed case record.

1.10. Miscellaneous 1.10.1. This section of the case record is designed to accommodate items that do not fall into

the previous categories. Items that could be kept in this section may include: copies of surveillance videos, copies of emails, sales receipts, evidence receipts, print-outs, photo copies of I.D. cards, autopsy/medical records, witness statements, and flash drives/DVD/CD’s containing crime scene video/photographs or other extra material as necessary. Typically, two DVD/CD copies are made. For Houston Police Department incidents, the first duplicate is sent via HPD interoffice mail to the Homicide Division for inclusion in their case file. For all other agencies, a copy of the video may be delivered/mailed to the agency if requested. The second copy is for the CSU case record and will be archived along with the case file in permanent storage.



1.11. Page Numbering and Case Identifiers

1.11.1. The Evidence Collection Division will utilize the following identifiers and page numbering system for their case file packets:

1.11.1.1. Each page must have the either the unique agency case number or the HFSC Forensic Case Number (FCN) legibly written or displayed on it.

1.11.1.2. The initials of the CSI who created/completed the documentation must be written on each page. For example, if a secondary CSI creates a diagram for another primary CSI, the diagram would have the second CSI’s initials on it. This requirement does not apply to LIMS reports.

1.11.1.3. Each page must have the date it was generated/completed legibly written or displayed. This requirement does not apply to LIMS and RMS reports.

1.11.1.4. Case note sections forming part of the case file will be page numbered per section and the total number of pages will be denoted on the Case File Checklist form.

1.11.1.5. Each section (forms, reports, diagrams, etc.) listed in the Case File Checklist form will have each section’s total number of pages. The total number of pages per section and for the whole case record packet will be listed on the CSU Case File Checklist form.

1.11.2. Exceptions: 1.11.2.1. This page numbering system excludes: tab pages used to divide sections within the

case record packet. 1.11.2.2. If the pages automatically populated with a page numbering system. It is not

necessary to physically re-number them. 1.11.2.3. The total number of CD’s/DVD’s will be listed on the CD/DVD section of the Case

File Checklist. These will not count toward the total page count. 1.11.2.4. If the data (i.e. Case number, date, and identity) must be handwritten, and space is

available, it should be placed in the lower right corner of the page. Otherwise place it elsewhere on the page as necessary.

1.12. Case Record Reviews

1.12.1. CSIs are required to submit crime scene case records such as notes, diagrams, photographs, and reports which are technically and administratively accurate and conform to the CSU SOPs and the HFSC Quality Manual.

1.12.2. Every case submitted by a Crime Scene Investigator will undergo an administrative review. A minimum of 25% of case records which involve crime scene investigation will undergo a technical review. A technical review and administrative review is documented by electronically signing the report in LIMS.



1.13. Administrative Review 1.13.1. All case records will be submitted to an authorized supervisor or investigator for an

administrative review. An administrative review consists of reviewing the case notes, examinations, and the laboratory report to ensure that:

1.13.1.1. Grammar and spelling is accurate. 1.13.1.2. Page number, investigators initials, and other requirements are in the case notes. 1.13.1.3. All necessary documents have been submitted with the case record (i.e. video,

diagrams, etc.). 1.13.1.4. A review of all examination records to ensure that the unique case identifier,

investigators initials, and appropriate page numbering system are on applicable pages.

1.13.1.5. The RMS report has been reviewed and approved by a supervisor for HPD crime scenes.

1.13.2. Completion of the administrative review will be documented and maintained in LIMS when the administrative reviewer has determined that the report is satisfactory and has made the appropriate menu choice to successfully review the report and finalize it for publishing.

1.13.3. The case file checklist will also be signed on the suitable entry line with the date and the initials of the administrative reviewer.

1.13.4. If the reviewer finds that the case file/report is deficient, it will be returned to the CSI for corrections and resubmission.

1.14. Technical Review 1.14.1. All case records that require a technical review will be submitted to a qualified

supervisor or investigator. A technical review consists of reviewing the case records notes, examinations, the test report and, if applicable, case photographs, video or sketches to ensure that:

1.14.1.1. Conclusions are accurate and supported by the examination records. 1.14.1.2. The case actions conform to technical procedures. 1.14.1.3. The appropriate technical procedures (test methods) were used. 1.14.1.4. The calculations and measurements/data transfers were accurate. 1.14.1.5. Collected exhibits and their locations are identified and documented properly. 1.14.1.6. The accuracy of report results and conclusions are supported by the technical data. 1.14.1.7. Proper recording of actions, evidence, and procedures is completed correctly. 1.14.1.8. Completion of the technical review will be documented and maintained in LIMS

and the Technical Review Checklist will be completed when the technical reviewer has determined that the case record and reports is satisfactory.



1.14.2. The case file checklist will also be signed on the suitable entry line with the date and the initials of the technical reviewer.

1.14.3. If the reviewer finds that the case file/report is deficient, it will be returned to the CSI for corrections and resubmission.

1.15. Resolution of Differences of Opinions 1.15.1. If the CSI disagrees with or has a difference of opinion with regards to the deficiencies

presented by the technical reviewer, then the issue will be brought to the Technical Supervisor who will review the issues and decide on the correct resolution for the matter. If the Technical Supervisor is one of the disagreeing parties, then the issue will be brought to the ECD Director for resolution. The resolution of differing conclusions will be recorded in the case record. In addition, a Quality Division incident report form will be filled out detailing this issue to ensure it’s reviewed during the annual management review.


EVIDENCE COLLECTION DIVISION CRIME SCENE UNIT

CRIME SCENE INVESTIGATION GUIDELINES

Crime Scene Unit Crime Scene Investigation Guidelines

Evidence Collection Division 1. Crime Scene Investigation 1.1 Scope The Crime Scene Unit is responsible for supporting investigators in the processing of major crime scenes that includes but not limited to homicides, juvenile deaths, suspicious death investigations, officer involved shootings, in-custody deaths, and sexual assaults. Scenes should be worked with an investigator present or the requesting agency liaison. The Crime Scene Investigator (CSI) will decide what evidence to collect based on the scene information available from the assigned investigator or requesting agency contact, his/her training, and experience.

1.2 Procedure Deviations There may be instances in which a crime scene investigator may be required to deviate from the processing procedures for the HFSC Crime Scene Unit or the tasks requested are outside the assigned CSI’s scope of training. Deviations from established procedures will be documented in the case record. For instances outside the scope of training, a qualified CSI will be called and assigned to assist or work the crime scene. Such instances may involve staged crime scenes, blood spatter analysis, or bullet reconstruction trajectory. 1.3 Primary, Secondary and Trainee CSI Responders On instances where a crime scene requires more than one CSI, one CSI will assume the primary responder role and the others will assist in processing the scene as the role of secondary responders. The identity of the secondary responders and the crime scene processing function they helped with will be documented in the case record. It must be clear from the case record who performed each stage of the investigation/analysis/examination and when it was performed.

Primary Responder: An authorized Crime Scene Investigator assuming the lead role for the processing and documentation of a scene. As a primary responder, this individual may delegate processing functions to other responding CSI’s, but is responsible for writing the final report. Secondary Responder: An authorized Crime Scene Investigator that assists the primary CSI responder in the processing and documentation of a scene. Trainee Responder: A trainee is a CSI undergoing training, who has not been authorized to process, document, and collect evidence from crime scenes without supervision, but may assist primary responders at scenes.

1.4 Weather Deviations Weather conditions may cause destructive damage to evidence present at a crime scene. The CSI should prioritize the documentation and preservation of evidence present at the scene with special emphasis on any biological or latent print evidence. In an instance where, prior to the CSI’s arrival to the scene, the CSI may need to provide verbal instruction on proper documentation, preservation and/or collection of evidence, this will be documented in the case record. Deviations caused by weather conditions will be documented in the case records. 2. Scene Procedures: 2.1 Initial Callout:

2.1.1 CSI’s are assigned to a case on an informal rotating basis when the request for service comes into the unit via a telephone or police radio call.

Crime Scene Unit Investigation Guidelines ECD-CSU-InvG Issued By: Acting ECD Director Issue Date: October 7, 2015 Uncontrolled When Printed Page 2 of 6



2.1.1.1 The CSI assigned to the call is determined by attendance, current work shift availability, and any specific needs that the call might have.

2.1.2 Using a segmented dry erase board and a marker the CSI will: 2.1.2.1 Record location of scene and the date and time the call was received. 2.1.2.2 Record the type of call. 2.1.2.3 Record the requesting agency case number. 2.1.2.4 Record the responding CSI’s name.

2.1.3 On a daily basis, the office assistant, data clerk entry, or other personnel designated by the administrative supervisors should enter the calls for service into a database (MS Access or LIMS) for storage and review.

2.2 Scene Arrival/Initial Assessment:

2.2.1 Record date and time of arrival in the CSI case notes. If a crime scene log is kept, sign in and contact the primary Officer or Investigator in charge of the scene.

2.2.2 If known, obtain a brief synopsis of the events that transpired (who has entered the crime scene, whether anything has been moved, why it was moved, and who moved it).

2.2.3 Determine if a search warrant or written consent is required. Any irregularities or questions of consent or search warrant should be dealt with and clarified before the processing of the scene commences. If yes, do not begin scene processing until the warrant is obtained for the areas to be covered by the warrant.

2.2.3.1 If possible, the determination for a search warrant or consent should be determined prior to going to the scene.

2.2.4 If it is determined that a search warrant is needed, the CSI should consider whether or not to remain at the scene as this process could take several hours to complete.

2.2.5 CSI’s are not responsible for obtaining or completing a search warrant. The agency requesting crime scene assistance is responsible for obtaining a search warrant. Responsibility for this lies with the patrol officer or scene investigator as applicable.

2.2.6 Complete a preliminary walk-through of the scene with the officer or assigned investigator, if present.

2.2.7 Wear appropriate personal protective equipment and establish a pathway in and out of the scene least likely to disturb or contaminate potential evidence.

2.2.8 Determine whether the perimeter of the crime scene is adequate to preserve and protect any possible items of evidentiary value. If not, direct actions necessary to properly secure the scene and protect the evidence. Contact a patrol or investigative supervisor for additional resources if necessary.

2.2.9 Determine if there are secondary scenes that require additional CSIs. 2.2.10 Monitor the current weather to determine if any alternate procedures for documenting or

collecting evidence are required. 2.2.11 Determine whether any special equipment or additional personnel are needed. 2.2.12 Ascertain whether any fragile evidence is present, and if so, develop a plan for collection.

3. Documentation 3.1 Ensure photographs are taken prior to a search being conducted and again after evidence markers

are placed. 3.2 Depending on the type of scene, ensure a video recording and/or sketch is completed.



Evidence Collection Division 3.3 Maintain legible written notes on all aspects of the scene processing, to include rough sketches and

measurements. 1.1.2 Scene notes are to be preserved and submitted with the completed case record.

4. Search 4.1 Ensure that a thorough search of the scene is conducted using an appropriate search method.

Searching should be done incrementally and in an appropriate sequence in conjunction with other documentation methods throughout the duration of the investigation to avoid disturbing the scene or an item of evidence prior to it being properly documented or the other evidence item collected.

4.2 Use police or CSI personnel at the scene to assist in the search if necessary. 4.3 The evidence search should be coordinated with the case investigator or requesting agency liaison

present to ensure all evidence is properly identified. 5. Sketch 5.1 Ensure the scene is sketched in accordance with the procedures outlined in the Sketching

procedure. 5.2 In most instances, a sketch will be completed on all homicide scenes and officer involved shooting

scenes. In these instances, the CSI will confer with the assigned investigator or requesting agency liaison as to whether or not a formal diagram is needed. Document in the case record if a formal diagram is not needed.

5.3 Sketches will be completed on other major scenes at the discretion of Crime Scene personnel.

6. Evidence Collection 6.1 Ensure appropriate documentation has been completed prior to collection of the evidence. 6.2 Evidence should be recovered by a CSI in the following order:

6.2.1 Biological Fluids (DNA, blood, etc.). 6.2.2 Trace Evidence (hair, fibers, etc.) 6.2.3 Friction Ridge Evidence (fingerprints, etc.). 6.2.4 All other items to be collected.

6.3 If possible, a review of the evidence should be conducted with the investigator or requesting agency liaison in order to determine items of evidentiary value that he/she wants collected. 6.3.1 Although not an inclusive list, the following types of evidence may be present at crime

scenes: 6.3.1.1 Latent prints 6.3.1.2 Footprints, tire tracks, shoe impressions 6.3.1.3 Clothing 6.3.1.4 Trace evidence (hairs/fibers) 6.3.1.5 DNA (e.g., blood/saliva) 6.3.1.6 Weapons (e.g., knives, guns, ballistic evidence) 6.3.1.7 Gunshot Residue 6.3.1.8 Tool marks 6.3.1.9 Suicide notes or associated writings 6.3.1.10 Prescription medications 6.3.1.11 Narcotics 6.3.1.12 Video evidence from surveillance cameras 6.3.1.13 Recovered stolen property




6.3.1.14 Bedding material (sheets, blankets)

7. Latent Print Processing 7.1 Ensure anything that may be affected by print processing has been documented prior to processing

for prints. 7.1.1 If assistance is needed for special processing, contact a CSU supervisor or CSI trained in the

necessary techniques. 7.1.2 If assistance beyond a reasonable amount of processing or advanced latent print processing

is needed, contact the Latent Print section for assistance or guidance. 7.2 If an investigator or requesting agency liaison is present, discuss which areas they request to be

processed for prints.

8. Final Survey 8.1 A final walk-through of the crime scene is completed to ensure the scene has been thoroughly

processed, all identified evidence has been collected, and all equipment has been removed. 8.2 The assigned investigator or liaison should be present during the final walk-through. 8.3 All persons involved in the scene investigation should meet to discuss the scene evidence to ensure

all necessary processing and collection has been completed.

9. Release of the Crime Scene 9.1 Notify the officer, investigator, or liaison when the processing of the scene has been completed. 9.2 The release of the crime scene is the responsibility of the assigned investigator or liaison.

10. Special Processing of Vehicles 10.1 The Crime Scene Unit maintains a secured Vehicle Examination Building (VEB) at an off-site

location. This location consists of a building with several garage bays where vehicles can be safely stored inside as needed until they are processed for evidence. This building has an overflow parking area that is contained within a secured fenced area. This restricted access area is secured twenty-four hours a day by fencing and locks.

10.2 This building allows vehicles to be processed in a controlled and properly lit area as well as allowing them to be stored until consent or a search warrant is obtained for the vehicle.

10.2.1 When a vehicle has been brought to the VEB, personnel assigned to the VEB will contact the division or assigned investigator to determine what processing needs to be completed for the vehicle.

10.2.2 If it is determined that a search warrant or consent for the vehicle needs to be obtained, then the CSI will not process the vehicle until advised by the division or assigned investigator that either a search warrant or consent has been obtained.

10.2.3 How the vehicle was elected to be processed (i.e. warrant, consent, etc.) will be documented in the case notes or incident report.

10.2.4 If the division or assigned investigator is unable to be contacted, or does not complete a consent/warrant to search within a two week period, the vehicle may be moved to an HPD storage facility or the requesting agency storage facility as the space may be needed for vehicles that have had proper documentation completed. Long term storage is not a possibility at the VEB facility.



Evidence Collection Division 10.3 Vehicles will be processed by Crime Scene Investigators who are assigned to the VEB. However, in

times of large volume or low attendance, CSI’s who are not assigned to the VEB may process vehicles at the VEB out of operational necessity.

10.4 These vehicles can be processed using the same techniques and methods for: 10.4.1 Photographs or diagrams. 10.4.2 Bodily fluid recovery for DNA. 10.4.3 Hair/fiber/trace evidence. 10.4.4 Latent prints. 10.4.5 Ballistic or other relevant firearms evidence. 10.4.6 Recovery of personal property or evidence.

11. REFERENCES

Fisher BA. 2004. Techniques of Crime Scene Investigation. 7th ed. Boca Raton (FL): CRC Press.


EVIDENCE COLLECTION DIVISION CRIME SCENE UNIT

BIOLOGICAL EVIDENCE PROCEDURE

Crime Scene Unit Biological Evidence Procedure

Evidence Collection Division 1. Biological Evidence 1.1 Scope The Crime Scene Unit is responsible for the proper documentation, collection, and preservation of biological evidence, which may include blood, semen, saliva, perspiration, urine, feces, and contact DNA. A presumptive test should be considered before collecting questioned stains of suspected blood. 2. Sample Selection On those substrates where biological evidence is reasonably suspected – such as the lip area of a drinking container, samples should be collected. Several collection methods are outlined below. Regardless of collection method chosen, gloves will be worn during collection and changed between the collections or testing of samples or as the gloves become contaminated. The area or item to be sampled is based on the training and experience of the CSI. The number of samples selected will vary from scene to scene; these variables include the number of blood sources, potential weapons used, mechanism of injuries, etc.

3. Equipment

• Gloves, masks, goggles • Distilled water or sterile saline • Sterile swabs • Swab boxes • Packaging material (boxes, paper bags/glassine envelopes, tape) • Pipettes

4. General Collection 4.1 Suspected bloodstains to be sampled should be photographed prior to collection. When samples

are collected directly from subjects, establishment and identification photographs should be taken. After ensuring that all documentation of the biological evidence has been conducted, the following preference for collection should be performed.

4.2 Collect a sample, the entire item, or both on which the evidence is located. 4.3 It’s the CSIs discretion in determining whether the entire item should be collected, if a sample is

collected or both. 4.3.1 If the item will not fit in the usual packaging containers, the area of concern (e.g. bloodstain

on door, blood or contact DNA on a bat) should be protected using paper to cover the area. 4.3.2 If the biological evidence is wet and located on clothing items or bedding, those items may be

placed in a plastic bag for transport only. Evidence should be immediately removed from the plastic bag and dried upon return before the evidence is tagged. If applicable, the plastic bags should be kept and tagged as evidence.

4.3.3 The wet items must be secured in a drying cabinet or drying room until they are dry enough for packaging and submission into evidence.

4.3.4 The dried evidence should be packaged in paper.

Crime Scene Unit Biological Evidence Procedure ECD-CSU-BioP Issued By: Acting ECD Director Issue Date: October 7, 2015 Uncontrolled When Printed Page 2 of 6


Evidence Collection Division 4.4 Cut the evidence from the item on which the evidence is located.

4.4.1 If the entire item cannot be collected, a representative sample will need to be removed from the substrate and retained.

4.4.2 This method may be used on items such as furniture, carpets, doors, window sills, car seats, etc.

4.4.3 Package the cut evidence in paper material, such as paper bags and or glassine envelopes.

4.5 Collect a sample of the evidence from the item the evidence is located on: Applicator: a sterile cotton Q-tip or similar device used to collect a representative sample.

4.5.1 If it is not practical to collect the entire item or cut a sample from the substrate, a sample of the evidence should be collected.

4.5.2 A presumptive test may be conducted on suspected bloodstains, prior to collection, unless the stain is so minute that performing the test would not leave enough for analysis. The guidelines described in the Presumptive Testing Procedures should be followed.

4.5.3 Use two applicators to collect the sample, if the sample permits. 4.5.4 For dried stains, sterile applicators should be moistened with distilled water or sterile saline,

then rotate the applicators through the stain until the applicator appears saturated with the stain or until the stain appears depleted.

4.5.5 If the stain is wet, rotate the applicators in the stain until the applicator appears saturated with the stain or until the stain appears depleted.

4.5.6 The applicators must then be air dried. 4.5.7 Once dry, the applicators should be placed in a biological evidence collection box (swab box)

and labeled with the identifying information, including the subject’s name, date of collection, collector’s name, and related case number.

4.5.8 Applicators from the same stain should be packaged together. 4.5.9 Applicators from different stains must be packaged separately.

4.6 Contact or Touch DNA

4.6.1 Swabs from different areas of the same item should be separate from other samples. 4.6.2 There will be certain situations in which DNA may be present on a substrate, but it is not

readily apparent or may be degraded by weather or other factors such as decomposition. These surfaces may be swabbed or collected for possible DNA at the discretion of the crime scene investigator or if requested by the police investigator. Visible stains are not considered contact or touch DNA and should be collected as described above.

4.7 Firearms

4.8.1 The handgrips, trigger, trigger guard, slide serrations, safety, hammer, magazine release, and base should be sampled with two swabs and packaged. Depending on the scenario, items may need to be collected and packaged separately.

4.7.1 Fired cartridge cases should not be swabbed for DNA unless they were believed to have been handled by the suspect after the incident.



Evidence Collection Division 4.8 Vehicle Surfaces (e.g., steering wheel, gear shift knob, seatbelt latches, Etc…)

4.8.2 All surfaces from one seating area (e.g. driver seat, passenger seat) should be swabbed together and packaged as one item. Depending on the scenario, items may need to be collected and packaged separately.

4.8.3 Exterior surfaces should be collected separately from interior surfaces. 4.9 Other Surfaces (weapon handles, door knobs, light switches)

4.9.1 Two applicators should be used and swabs from different surface locations should be packaged separately.

5. Collection from Individuals When requested by the investigators or the requesting agency liaison, CSIs may collect DNA reference samples (buccal), clothing and other evidence directly from individuals. Known reference samples (buccal swabs) should be collected from individuals when unknown/questioned evidence samples are collected directly from them, such as penile swabs, red brown stain on arm, or swabbing of fingers. A known reference sample (buccal swab) should be obtained from subjects when their clothing is collected directly from the individual(s).

The subject must provide consent for the collection or a legal search warrant obtained. (Consent is the responsibility of the investigating officer in charge or Agency requesting CSI assistance.)

5.1 Buccal Swabs

5.1.1 Two sterile applicators will be used to collect DNA sample by rubbing the applicators in the interior cheek area of the subject’s mouth for approximately 15 seconds.

5.1.2 The swabs will be air dried and packaged inside a swab box. 5.1.3 The swab box will be labeled with the subject’s name, date of collection, collector’s name,

and related case number.

5.2 Penile Swabs 5.2.1 Penile swabs will only be collected at the request of the criminal investigator from the

division responsible for the investigation. 5.2.2 Male crime scene investigators will collect penile swabs. Female CSIs will not collect penile

swabs. 5.2.3 Two sterile applicators will be moistened with distilled water or sterile saline and used to

collect the penile swabs. Avoiding the urinary opening, the entire penis and scrotum area will be thoroughly swabbed.

5.2.4 The swabs will be air dried and packaged inside a swab box, labeled with the subject’s name, date of collection, collector’s name, and related case number.

5.3 Body Swabs

5.3.1 To collect potential evidence from other body parts, swabs will be collected when requested by an officer or investigator.

5.3.2 Two sterile applicators will be moistened with distilled water or sterile saline and used to swab the body part.

5.3.3 The swabs will be air dried and packaged inside a swab box, labeled with the subject’s name, date of collection, collector’s name, and related case number.




5.3.4 For sensitive areas such as female/male genitalia, breasts, buttock area, a same gender crime scene investigator will be utilized for the collection of the swabs.

5.4 DNA Evidence Under Nails

5.4.1 Evidence under the nails will be collected at the request of the criminal investigator from the division responsible for the investigation. Swabs should be collected prior to any clippings or scrapings.

5.4.2 Moisten two sterile applicators with distilled water or sterile saline and swab under the fingernails of each hand. Different applicators will be used for each hand. Each finger is swabbed with the same applicators for each hand.

5.4.3 The applicators from each hand will be packaged separately in a swab box and labeled with the subject’s name, date of collection, collector’s name, the related case number, and the specific hand designation the swab was obtained from (left hand/right hand).

5.4.4 If requested, use a sterile pair of clippers to clip the subject’s nails into a glassine envelope or bindle. The nail clippers should be packaged with the clippings.

5.4.5 A sterile scraping device will be used to scrape under the subject’s nails if requested. The device should be placed with the scrapings.

5.4.6 The clippings/scrapings from each hand will be packaged inside a separate glassine envelope or bindle, labeled with the correctly spelled name, date of birth, and specific hand designation the clippings/scrapings were obtained from (left hand/right hand).

6. Specific Collection and Packaging 6.1 Semen

6.1.1 A dried or small sample should be swabbed and stored at room temperature. 6.1.2 A collected wet sample and or an apparently recently used condom should be placed in a

container. 6.1.2.1 Wet semen or wet condom(s) will be tagged into the requesting agency’s property storage facility, with instructions to be stored frozen.

6.2 Feces

6.2.1 Feces will be of very limited value and should not normally be collected. However, if requested by the investigator, a small representation may be collected in a specimen cup and refrigerated as soon as possible. 6.2.1.1 The sample will be tagged into the requesting agency’s property storage facility.

6.3 Vomit

6.3.1 Suspected vomit will only be collected at the request of the investigator. 6.3.2 Collect a representative sample of the vomit in a specimen cup and refrigerate as soon as

possible. 6.3.2.1 The sample will be tagged into the requesting agency’s property storage facility.

6.4 Other Miscellaneous Items

6.4.1 Chewed Gum: Should be collected in a container and stored frozen. 6.4.2 Lip areas of drinking containers: Exterior surfaces of bottle caps should be swabbed

separately from the interior surfaces. 6.4.3 Contaminated Items from Decomposition




6.4.4.1 Those items contaminated with decomposition fluid and infested with insect activity should be swabbed for possible DNA prior to packaging.

6.4.4.2 Swab samples for DNA should be collected before any further decomposition can occur or decomposition fluid may be transferred to other parts of the evidence during packaging and transport. If decomposition fluid is present on an item, the item should be swabbed for DNA prior to packaging or transport.

6.4.4.3 The swab samples should be from pertinent areas that are not saturated with decomposition fluid. Those areas saturated with decomposition fluid are not likely to yield any usable DNA results.


HOUSTON FORENSIC SCIENCE CENTER

EVIDENCE COLLECTION DIVISION

PRESUMPTIVE TESTING PROCEDURES

Crime Scene Unit Presumptive Testing Procedures ECD-CSU-PTP Issued By: CSU Quality Supervisor Issue Date: 07-09-2015 Uncontrolled When Printed Page 2 of 5

PRESUMPTIVE TESTING Various chemical processes and presumptive tests are utilized in crime scene investigations to assist

in the detection and development of potential evidence. These presumptive tests are useful in

determining the possible presence of biological material, but may produce a false positive reaction in

the presence of various resembling substances. Should a positive reaction take place, the result only

suggests the presence of biological material and that it may be worthy of collection.

Preparation of Reagents and Quality Control Checks All reagents will be quality tested to ensure reliability, and all associated lot numbers and QC checks

will be documented in the case record.

Sampling/Sample Selection The area to be sampled is based on the training and experience of the analyst.

Phenolphthalein Test Catalytic tests for blood are based on the peroxidase-like activity exhibited by the heme group of

hemoglobin. The test is exceedingly sensitive to minute traces of hemoglobin and its derivatives but

can produce a false positive reaction in the presence of any of a number of oxidizing substances.

Should a color reaction take place, the result only indicates the possible presence of blood; the test is

therefore a presumptive test.

Safety

Body fluids and extracts may contain infectious agents; therefore universal precautions

should be employed during biological evidence handling.

Gloves must be worn during testing.

This reagent presents the following hazards:

o Phenolphthalein solution B: Flammable. Handle with care. Harmful or fatal if

swallowed, inhaled, or absorbed through skin. Avoid contact with eyes, skin, and

clothing. Light sensitive! Avoid light, heat, sparks, and flame. Keep container tightly

closed.

o 3% Hydrogen Peroxide Solution C: Handle with care. May be harmful if swallowed,

inhaled, or absorbed through skin. Avoid eye contact (irritant). Avoid contact with eyes,

skin, and clothing.

Equipment, Materials, and Reagents

Sterile cotton swab(s)

Filter Paper

Disposable gloves

Phenolphthalein Forensic Test reagents –

o Solution A: Distilled Water

o Solution B: Phenolphthalein

o Solution C: 3% Hydrogen Peroxide

Controls:

o Positive control: Known blood (Blood Stain card)

o Negative control: Water


Quality Control

Before using phenolphthalein in the field, a positive and negative control must be used to test

the reagent.

The positive control test will be conducted by transferring a portion of the known blood sample

onto a cotton swab and administering the phenolphthalein reagents. A successful positive

control is a pink reaction to the known blood standard.

A negative control test will be conducted by moistening an unused cotton tip applicator with

distilled water. A negative control test should not show any color reaction.

This quality control check will be documented in the case record.

Record the phenolphthalein, distilled water, and 3% hydrogen peroxide lot numbers in the case

record.

Procedure 1. Moisten a sterile cotton swab or filter paper with sterile distilled water (Solution A). There is no

need to flood the swab or filter paper with water, just use a small amount. Take care not to

touch the swab or filter paper to the bottle.

2. Rub or press down on the suspected bloodstain with a sterile cotton swab or filter paper to

allow for any possible blood to transfer.

3. Apply approximately 1-2 drops of Phenolphthalein Solution B to the swab or filter paper.

4. Observe briefly to identify a color change. A green color is often observed when blood is

present.

5. Add approximately 1 drop of 3% hydrogen peroxide Solution C to the swab or filter paper.

6. Observe the swab or filter paper for an immediate pink color change indicating a positive

reaction.

7. After interpretation, record the results in the case record.

This is a PRESUMPTIVE test only! If the test is positive for blood, the stain or a sample may be collected

for analysis by the Houston Forensic Science Center. If the test is not positive for blood, then a sample

of the stain does not need to be collected.

Technical Notes If the stain is extremely small or is presumed to be blood by its appearance, the stain may be collected

without performing a phenolphthalein test.

If no potential blood stains are observed visually, a general swabbing of the area or item can be

performed and the phenolphthalein test run on those swabs. Do not perform a general swabbing on

areas to be printed.

Storage, Labeling, and Expiration The phenolphthalein test kits can be stored at room temperature. Each investigator should have an

aliquot of Solutions A, B and C that will be placed in dispenser bottles stored at room temperature.

Each bottle will be labeled with appropriate reagent name, lot numbers, and expiration dates. The kits

may be used on evidence samples up to the expiration date stated on the bottles.

Disposal Dispose of unused mix in a sink under running water.


Leucocrystal Violet Leucocrystal violet (LCV) reacts with the heme or iron group found in blood and gives a blue/purple

color reaction. This test can be used to identify bloodstains that are not visible and to enhance the

contrast of bloodstain patterns that are visible. Should a color reaction take place, the result only

indicates the possible presence of blood; the test is therefore a presumptive test.

Safety Equipment, Materials, and Reagents

5-Sulphosalicylic Acid (SSA)

3% Hydrogen Peroxide

Sodium Acetate (NaAc)

Leucocrystal Violet (LCV)

Spray bottle(s)

Disposable gloves

Positive control: Known blood

Negative control: Blank swab or other appropriate substrate

Reagent Preparation

Add and dissolve 10 grams of 5-sulfosalicylic acid in 500 mL of 3 % hydrogen peroxide.

Mix until all powder is completely dissolved.

Add 4.4 grams of sodium acetate to the solution.

Add 1.1 grams of leucocrystal violet to the solution.

Mix until all powder is completely dissolved.

Reagents can be adjusted to the volume needed.

Document the 5-sulfosalicylic acid, sodium acetate, and leucocrystal violet Lot #’s in the case

record.

Quality Control Prior to use, the LCV solution must be subjected to the appropriate quality control test as outlined

below:

Spray the LCV solution onto a known blood sample.

Spray the LCV solution onto a known non-blood sample (cotton swab or appropriate substrate).

The known blood sample must give a blue/purple color reaction indicating a positive result.

The cotton swab or other appropriate substrate must not produce a blue/purple color reaction

which indicates a negative result.

The results of each control test must be recorded on the case notes.

Procedure 1. The area of interest should be photographed both before and after the application of LCV

solution.

2. Complete the appropriate quality control reagent checks.

3. Lightly mist an area of interest until the first sign of blue/purple color is noted.

4. Development is typically within 30 seconds.

Storage, Labeling, and Expiration Do not use leucocrystal violet crystals that are yellow instead of white; this means the crystals are old.

The leucocrystal violet, 5-sulfosalicylic acid, and sodium acetate should be stored in a cool and dry

area away from incompatible substances.


Premeasured bottles containing LCV reagents should be labeled with the following information:

Chemical’s name

Stock bottle lot number

Amount weighed out

Date that the LCV reagent(s) was aliquoted

Preparer’s initials.

If stored, the prepared LCV solution has an expiration of 3 months from the date it was mixed together,

if stored in a cool and dry environment.

If stored, the LCV solution label must include at a minimum:

Reagents name

Lot number which contains the date prepared and the initials of the preparer (e.g.

mmddyyinitials)

Expiration date

Disposal

Dispose of unused mix in a sink under running water.

References Lytle, L. T. 1978. Chemiluminescence in the visualization of forensic bloodstains. Journal of Forensic

Sciences 23(3): 550-562.

Saferstein, R. Forensic Science Handbook: Identification and Grouping of Bloodstains, (Prentice-Hall,

Inc., 1982), p. 274.

Cox M. 1991. A Study of the sensitivity and specificity of four presumptive tests for blood.

Journal of Forensic Sciences. 36(5): 1503-1511.

Kirk P. 1974. Crime Investigation. 2nd ed. Malabar (FL): Robert E. Krieger

Publishing Company. Chapter 15, Blood: general testing; p.182-184.

Crime Scene Unit

Firearms Evidence Evidence Collection Division

Crime Scene Unit Firearms Evidence


Firearms Evidence ECD-CSU-FAEV Issued By: ECD Director Issue Date: February 15, 2016 Uncontrolled When Printed Page 2 of 5

1. Firearms Evidence

1.1. Scope:

1.1.1. Crime Scene Investigators are responsible for documenting and collecting firearms

evidence collected from crime scenes. Firearm evidence should always be photographed

according to the guidelines described in the Photography Procedure.

1.2. Documentation

1.2.1. Firearm evidence collected directly from other personnel

1.2.1.1. The following information must be obtained:

Name and employee number of person presenting the firearm

Full description of the weapon (e.g. make, model, serial number, color, grips, etc.)

Description of the condition of the firearm at the time presented, including

loaded magazines, debris, malfunctions, foreign objects used to make weapon

safe, or any dismantling.

1.2.2. Firearm evidence collected from a crime scene

1.2.2.1. Document the description, position and condition of the firearm, which may include

the following:

Location of recovery

Make, model, caliber, serial number if known

Color, grips

Position of the firearm (e.g. right side with barrel pointing north)

Position of the hammer

Stove pipe or jammed

Magazine seated or unseated

Safety on or off

Slide locked to rear or forward

Number, position, and type of cartridges inside the firearm

Any debris on the weapons such as blood, dirt, oils

1.2.2.2. Do not place any foreign object into the barrel or chamber area of a firearm as this

could destroy evidence.

1.2.2.3. Firearms will not be collected for “safekeeping” purposes unless directed by the

lead investigator or approved by a crime scene supervisor.

1.3. Officer Involved Shooting Additional Documentation and Testing Requirements

1.3.1. If the scene involves an officer(s) who has discharged his/her weapon, and a person was

hit or suspected to have been hit by the firearm discharge, the following procedure should

be followed:




1.3.1.1. The officer’s discharged weapon, extra magazines, etc. will all be charted in the

same manner as described in 1.2.1.

1.3.1.2. When practical, all other firearms that the officer(s) had at the scene will also be

charted.

1.3.1.3. When practical, all officers who were at the scene when the officer discharged his

weapon should have their weapons charted in the same manner.

1.3.1.4. All remaining live ammunition that was charted by the CSU will be returned to the

officer so that he may reload his weapon before leaving the scene.

1.3.1.5. Any deviation to this procedure must be directed by the scene’s lead investigator or approved by a crime scene supervisor.

1.4. Safety

1.4.1. Every firearm will be treated as if it is loaded.

1.4.2. After proper documentation, firearms will be unloaded and made safe. All firearms will be

unloaded prior to their release to the requesting agency and/or to the HPD Property

Division. Once unloaded, the CSI will visually inspect the barrel for any obstructions or

jammed ammunition.

1.4.3. If a firearm cannot be unloaded safely, assistance may be obtained from the HFSC

Firearms Section.

1.4.4. If a weapon cannot be made safe, the requesting agency will be responsible for the

collection and handling of the firearm.

1.4.4.1. If the requesting agency is HPD, the weapon will be placed into one of the Firearm

Lab lockers located on the first floor of the 1200 Travis building, behind the security

desk. A note will be attached to the locker indicating it contains a loaded firearm.

1.4.5. Requirements for unloading ALL weapons

1.4.5.1. When in the evidence processing room, CSI’s must utilize the designated clearing

barrel to unload a weapon or to verify a weapon has been unloaded. Point the

firearm into the clearing barrel until the firearm is made safe.

1.4.6. Requirements for unloading revolvers

1.4.6.1. Keep finger away from the trigger.

1.4.6.2. Document the position of the cylinder by marking the cylinder on both sides of the

top strap of the frame (indexing).

1.4.6.3. Open the cylinder.

1.4.6.4. Document in the appropriate form the location, type, and number of each cartridge.

1.4.6.4.1. Cartridge number 1 should be in the cylinder position with the firing chamber.

1.4.6.5. Carefully empty each chamber in a sequential order.

1.4.7. Requirements for unloading semi-automatic pistols

1.4.7.1. Point the firearm down or in a safe direction.

1.4.7.2. Keep finger away from the trigger.




1.4.7.3. Remove the magazine.

1.4.7.4. Pull back the slide to eject any additional ammunition.

1.4.7.5. Document in the appropriate form which cartridge was in the chamber.

1.5. Preservation

1.5.1. Marking of firearm evidence

1.5.1.1. Firearms should have a stamped identifying serial number present for identification.

1.5.1.2. When the weapon has no visible unique serial number, the CSI will mark his initials

and agency case number or forensic case number onto the weapon in an

inconspicuous location to distinguish it from all others. Further notations will be

made in the case record to indicate where on the firearm the inscription was placed

1.5.2. Packaging firearm evidence

1.5.2.1. Firearms will never be packaged loaded.

1.5.2.2. Based on the policies and procedures of the HPD Property Division, firearms should

normally be packaged in a plastic container. However, if the firearm contains

biological material, such as blood or tissue, the firearm must be packaged in a paper

or cardboard container. A biohazard sticker must be placed on the package.

1.5.2.3. A firearm will be rendered inoperable with an orange tie strap threaded in

accordance with the most current property room instruction bulletin.

1.5.2.4. The ammunition and the firearm will be packaged separately.

1.5.3. Collection and Packaging of Ammunition/Casings

1.5.3.1. Every attempt should be made to locate and recover all ballistic related evidence

such as fired cartridge casings and fired bullets.

1.5.3.2. Each fired cartridge casing or fired bullet should be packaged separately in its own

properly labeled container in a manner to distinguish it from all others, typically

indicated at a minimum with the evidence marker number. However, all of the

containers may be placed into a larger single container when tagged into the

Property Division.

1.5.3.3. To remove a projectile, such as a fired bullet, embedded in wood or plaster, the

investigator, after documenting the impact sight thoroughly, should cut out the

material surrounding the entire impact point, or cut carefully around the projectile

until it falls free.

1.5.3.4. Package the projectile individually in a plastic container or bag. Mark the packaging

with the appropriate information. Do not mark the projectile itself.

1.5.3.5. If the projectile is believed to contain biological material such as blood or tissue, it

should be packaged in a paper container and be properly labeled.




1.6. Documenting bullet strikes

1.6.1. Bullet strikes should be documented at a minimum with photography. It is recommended

that they also be thoroughly measured.

1.6.1.1. Bullet strike documentation should include:

1.6.1.1.1. Establish the strike’s location with horizontal and vertical distance

measurements.

1.6.1.1.2. Angles of impact should be recorded including azimuth and elevation.

1.6.1.2. Trajectories should be plotted and visually represented with a photograph.

1.7. Collection of Trace Evidence on Firearms

1.7.1. The collection of trace evidence, such as blood, hair, and touch DNA from firearms, at a

crime scene is at the discretion of the primary officer or lead investigator in charge of the

scene or the CSI.

1.7.2. Trace evidence that is visible should be removed prior to packaging and placed in a

separate envelope. The packaging must be clearly labeled.

1.8. Gunshot Residue Evidence

1.8.1. Gunshot residue (GSR) collection may be performed by a CSI at the request of the

investigator in charge.

1.8.2. Crime scene investigators will follow the manufacturer’s instructions provided inside each

collection kit.

1.8.3. GSR samples may also be collected from other surfaces such as the interior or exterior of

vehicles, clothing, and bed linens by sampling the area suspected to have been in the

vicinity of a discharged firearm.

1.8.4. The CSI must not attempt to recover GSR evidence from two or more individuals at the

same time. The collector must change gloves between each subject and between each

hand of the same subject. The collector must recap and secure each tab when complete

and place the right and left hand vials inside the GSR collection kit envelope.

1.8.5. Once collected, the GSR kit will be tagged and submitted to the requesting agency with

the appropriate labeling to include time of collection.

1.8.6. Collectors must be cautious and limit touching any firearm or duty gear that may contain

residual GSR capable of transferring during sampling.

Crime Scene Unit General Evidence Handling



Evidence Collection Division 1. General Evidence Handling

1.1. Overview 1.1.1. Crime Scene Unit personnel are responsible for the proper collection, identification,

packaging, preservation, storage, and submittal of a variety of different types of evidence. In general, all items of evidence should be documented as found prior to collection. As a matter of routine, Crime Scene Unit personnel are not responsible for collecting or tagging property that is not evidence.

1.2. Collection

1.2.1. Evidence identification and collection is based on the training and experience of the investigator.

1.2.2. Only those items of probative value (evidence) or as directed by an investigator should be collected.

1.2.3. All evidence should be collected and packaged in a manner that will preserve the item for future analysis and protect the item from contamination or damage.

1.2.4. When multiple items of evidence are present, tent markers or placards may be placed in close proximity to the item to mark each item of evidence or area of interest.

1.2.5. The investigator assigned to the case should be contacted prior to any damage or destruction of private property which may result from an evidence collection method. The conversation and approval will be documented in the CSU case report.

1.2.6. Prior to the damage or disassembly of an object – such as furniture, guns, vehicles, etc. in which damage or injury may be caused, the CSI should ensure that proper tools and skilled personnel are available and that other collection methods have been considered.

1.2.7. The Fire Department may be called for assistance with equipment necessary to collect evidence, such as ladder extension, cutting devices, or hazardous material collection.

1.3. Packaging 1.3.1. Evidence being transported from the scene must be protected from contact and

contamination from other items. 1.3.2. Clean butcher paper will be used on tables and shelves under all evidence during

packaging in the evidence processing area. 1.3.3. The exterior of the evidence package should be labeled with the item description and

location of collection (not physical address) to eliminate the chance of confusion with other items. If multiple cases are being transported in the same vehicle, the requesting agency case number should also be written on the packaging.

1.3.4. Generally, items of evidence should be packaged separately. Exceptions would be items that were comingled prior to collection.

General Evidence Handling ECD-CSU-GEH Issued By: Acting ECD Director Issue Date: November 5, 2015 Uncontrolled When Printed Page 2 of 7



1.3.5. Avoid packaging items so tight that proper re-packaging is not possible. 1.3.6. The following standard identification data should be correctly noted:

• Requesting agency case number • Evidence marker or placard number for the item • Date collected • Location of collection • Name of CSI or person packaging the evidence.

1.3.7. Where practical, a description of the item contained within the sealed package should be included on the package.

1.3.8. All mistakes on the packaging will be properly corrected with a one line strike through and initialed.

1.3.9. At a minimum, the employee’s initials and/or signature and date the package was sealed will be written across the seal.

1.3.10. The evidence tape should not obstruct any other information on the packaging, especially bar codes.

1.3.11. Once packaging has been completed, the Crime Scene Investigator must ensure that all unused packaging supplies are discarded or returned to the proper storage location.

1.3.12. All garments, clothing, bedding material or cloth items should be wrapped in clean butcher paper so that when folded, no portion of the cloth folds over onto another portion of the cloth. This is especially true for items stained with blood or biological fluids.

1.4. Wet Evidence Storage Prior to Packaging

1.4.1. Frequently, crime scene evidence is damp or wet with blood, water, or other bodily fluids. To prevent spoilage or degradation of the evidence, it must be allowed to properly dry and then be packaged for storage. For that purpose, the Crime Scene Unit has several drying cabinets that are located in controlled access areas within their workspace. Appropriate personal protective equipment should be used to prevent contamination when handling evidence in the CSU.

1.4.2. Clean butcher paper will be used on tables and shelves under all evidence. 1.4.3. Evidence that must be dried before analysis or storage will be placed in one of the drying

cabinets. 1.4.3.1. The CSI will inspect the drying cabinet and review the cleaning log before placing

evidence inside. 1.4.3.2. Once the items of evidence have been dried, the CSI will remove the items and

properly package the evidence. 1.4.3.3. The CSI will thoroughly clean the drying cabinet by following all the drying cabinet

instructions for cleaning, i.e.: removing proper filters for tagging and using cleaning agents to disinfect the inside of the cabinets. This will ensure that the cabinet is clean




and ready for use by the next CSI. This will be documented in the cleaning log near the drying cabinets.

1.4.3.4. Any time anyone opens the drying cabinet, they will sign the log book located on the outside of the drying room door.

1.4.3.5. Once evidence had been tagged and drying cabinets have been cleaned, the CSI will ensure that the door to the drying room is locked.

1.4.4. Evidence collected by the CSI will occasionally and unavoidably be infested with insects – usually maggots and flies. To reduce risk of infestation, the following precautions should be followed:

1.4.4.1. For maggots and flies, a fly strip may be affixed inside of the drying cabinet area. 1.4.4.2. Precaution should be taken to avoid the release of maggots and flies into the drying

room area. These precautions should include keeping the door to the drying cabinet closed until the flies and maggots have died.

1.4.4.3. If a CSI enters the room and observes an infestation, they will notify a supervisor, and measures will be taken to rid the area of the insects.

1.4.4.4. Once the insects have been completely removed, the ENTIRE drying room and cabinets will be cleaned with cleaning agents and documented in the cleaning log. The cleaning procedure is documented on the wall of the drying room.

1.4.4.5. If all the drying cabinets are in use, evidence may be placed on butcher paper and dried at room temperature.

1.5. Temporary Storage of Evidence 1.5.1. On occasion, it may be necessary to secure evidence overnight in the Crime Scene Unit

pending packaging or waiting for a court appearance. Lockers for this purpose are available in the CSU Evidence Room.

1.5.2. If the evidence is valuable in nature (money, jewelry, etc.), then the CSI should utilize the locker with a padlock and key on it. Otherwise a normal locker (without a padlock) can be used.

1.5.3. Place the evidence into one of the lockers. 1.5.4. Close the locker door. 1.5.5. Secure the locker door by attaching a single use, numbered, evidence tag through the

door handle. Document the tag number in your notes and enter into your report. 1.5.6. If a CSI is to utilize the locker with the padlock and key on it, you must also attach a single

use, numbered, evidence tag. Document the use of the lock, the tag number in your notes, and enter it into your report.

1.5.7. Complete an entry in the Evidence Locker log book with the following information: • Date • Incident number




• Name of CSI • Locker number • Time the evidence was put into the locker • Evidence tag serial number

1.5.8. When the evidence is removed, check the evidence serial number tag to ensure the same tag number is still attached to the door. Remove the tag and retrieve the evidence.

1.5.9. If the serial tag number is not correct, immediately report the issue to a Crime Scene Unit supervisor.

1.5.10. When removing evidence from the locker, complete the entry in the Evidence Locker log book with the following information: • Date and time the evidence was removed from the locker. • The CSI removing the evidence.

1.5.11. Document the same information in the case record.

1.6. Use of a Faraday Bag for the Storage of High Value Electronic Devices: 1.6.1. A Faraday Bag is a single use, sealable pouch designed to ensure that an electronic device

such as a cell phone, tablet, etc. recovered by a CSI remains secure from external communications designed to remotely wipe data, allow the device’s location to be tracked, or allow the device to be remotely used (i.e. camera, microphone). If evidence is suspected of being tampered with, it could be ruled as inadmissible in court. The Faraday Bag is made with materials that block wireless signals from entering or leaving the bag, thus protecting the integrity of the device in the bag from outside influences.1

1.6.2. How it works 1.6.2.1. The Faraday Bag is a silver anti-static, foil looking, disposable plastic or Mylar bag

with an evidence label and an adhesive seal backing. It works by weakening or attenuating the intensity of electromagnetic waves (i.e. radio, Wi-Fi, Bluetooth, cellular networks, etc.) both coming out of and going into the bag. This reduction in intensity prevents the radio network and the electronic device from communicating with each other, effectively isolating the device.

1.6.3. Cautions2 1.6.3.1. The device and its data must be preserved as much as possible. 1.6.3.2. Do not attempt to access the device.

1 Information Security Management Handbook, 6th Edition, Volume 7, by Richard O’Hanley and James S. Tiller, page 311.

2 Computer Forensics: Evidence Collection and Management by Robert C. Newman, page 320.




1.6.3.3. If possible, do not turn the device on, off, or wake it from sleep/standby mode. If the identifying information is needed (i.e. the serial number.) by the agencies storage facility, write down the information prior to placing the item in the bag. This may require removal of the battery and would turn the device off. If the battery is removed for this, leave the battery separate (detached) from the phone for storage.

1.6.3.4. Place the device into the Faraday bag as soon as possible; this will prevent the device from being exposed to external influence such as wiping.

1.6.3.5. If possible, maintain power to the device by gathering any necessary cables, chargers, etc.

1.6.3.6. The Faraday Bag, while effective, may not prevent all radio transmissions to and from the device.

1.6.4. CSU Procedure 1.6.4.1. Please keep in mind that every electronic device does not need this level of data

protection. If the device recovery is routine (e.g. a suicide, accident, etc.) or is not relevant to the case, then there is no need to place the device in a Faraday Bag and the phone can be stored normally at the agency’s storage facility.

1.6.4.2. However, if at a scene and a CSU or an investigator determines that an electronic device such as a cell phone or tablet needs to be protected from remote tampering, wiping, or monitoring, the following procedure should be used:

1.6.4.2.1. Recover the device “as is”, keeping the above cautions in mind. 1.6.4.2.2. The device should be placed into an appropriate sized Faraday bag (cell phone

or tablet size) ensuring that the entire device fits within the bag. 1.6.4.2.3. Fill out the evidence label with all relevant information (i.e. Make, Model,

Phone number, etc.) and seal the bag with the adhesive backing on the edge of the bag.

1.6.4.2.4. For proper use of the disposable Faraday Bags, make two distinct downward folds of the bag and seal with evidence tape and your initials. This ensures that the end of the bag is properly sealed.3

1.6.4.2.5. For an even more secure signal block, use a bag-in-a-bag approach to double the thickness of the signal blocking bags. This should only be done if absolutely necessary for the preservation of the data (i.e. there has already been an attempt to access the data, the data is extremely critical for the investigation, etc.). In most cases, the single bag approach is more than sufficient for normal use.

3 Best Use Practices for Disposable Faraday Bags, http://www.tritechforensics.com/store/product/disposable-faraday-bags/#readmore




1.6.4.2.6. Once the Faraday bag is sealed, do not reopen the bag.

1.6.5. Questions About Use 1.6.5.1. For specific questions related to this procedure that are not addressed here, please

consult with the Houston Forensic Science Center’s Digital Forensic Lab for advice, instructions, or a call-out. After hours, contact the HPD Command Center for call-out information.


Crime Scene Unit Sketching



Evidence Collection Division 1. Sketching

1.1. Scope

1.1.1. The Crime Scene Unit is responsible for producing formal sketches or diagrams of homicide and officer-involved shooting crime scenes. Informal rough sketches on other types of scenes may be produced for recollection or as reference. The sketches are used as another form of evidence documentation and provide spatial relationship information for items depicted in photographs. The sketch is meant to complement other forms of documentation as well as serve to refresh the memory of investigators. The sketch is also used in court proceedings to illustrate the testimony of witnesses.

1.2. Definitions

1.2.1. Rough Sketch – hand-drawn document depicting a view of a scene or structure most often used to aid the investigator with the creation of a formal sketch at a later date. The rough sketch is considered part of the investigator’s field notes created contemporaneously with the investigation and may or may not include measurements or dimensions on the same page. Not all information documented on a rough sketch is required to be included in the formal sketch. However, all information included on the formal sketch should be on the rough sketch or field notes.

1.2.2. Formal Sketch – Also known as a formal diagram or final sketch; document depicting the view of a scene or structure most often created with the aid of computer drawing software or drafting tools. The creation of the formal sketch is based on the investigator’s rough sketch data and is usually completed sometime after the investigation. The formal sketch may consist of one page or many pages used to provide a clean, uncluttered document presentable for admission as a courtroom exhibit. Formal sketches should include not to scale measurements or dimensions.

1.2.3. Scaled Diagram – is a document drawn by hand or through computer software where every item and portion of the structure is depicted showing all measured parts in the same proportion of their true size. If a diagram does not meet this definition, it must contain the words “Not to scale” as part of its reference labeling.

1.2.3.1. Degree of Accuracy – is reported as a unit of measure usually stated as a plus or minus within which the measurements obtained for a diagram were kept. Ex. “plus or minus 3 inches”. The degree of accuracy is not stated on the diagram but is noted by the diagram’s creator.

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1.3. Responsibilities 1.3.1. Crime Scene Investigators will ensure that a rough sketch is completed

contemporaneously with the investigation, including gathering appropriate measurements, when requested or determined to be necessary.

1.3.2. Crime Scene Investigators will complete a formal sketch of the crime scene when requested or determined to be necessary using the rough sketch data. The rough sketch and finished sketches will be included in the CSU case record, and a copy of the final sketch will be forwarded to the assigned investigators.

1.4. Methods for Recording Measurements

1.4.1. The overall layout of the crime scene should be drawn as a framework for all reference measurements.

1.4.2. If a scale diagram is desired, the appropriate scale must be depicted. A diagram not to scale does not preclude a scale from being included for reference.

1.4.3. Obtain measurements for the overall layout of the scene. Other more detailed measurements and dimensions of items within the scene may include, but are not limited to, doors, windows, major pieces of furniture, ceiling heights, and relationships between fixed objects and items of interest.

1.4.4. A crime scene sketch may be depicted in various methods: 1.4.4.1. The “projection sketch” is drawn as seen from above, a bird’s eye view. 1.4.4.2. The “cross-projection sketch” is drawn to include the walls and ceiling being folded

out to the same plane as the floor. 1.4.4.3. The “elevation sketch” is drawn to show vertical planes from the perspective of

viewing straight on. 1.4.4.4. A “detailed sketch” may be used when illustrating a small area in detail and is

typically depicted in a scale larger than the scale of the main diagram. Detailed sketch is sometimes referred to as a “blow-up”. A detailed sketch may also be used when illustrating the interior of vehicles, bullet strikes, blood stain patterns, etc.

1.4.4.5. A 3-D sketch may be used to better illustrate specific details not readily visible in a 2-D diagram.

1.4.5. Items of evidence or points of interest should be fixed within the sketch by at least two measurements.

1.5. Elements of a Formal Sketch

1.5.1. Every formal sketch must include: 1.5.1.1. A compass direction, usually NORTH. The orientation of the diagram is at the

discretion of the CSI.




1.5.1.2. “Drawing not to scale” if diagram does not meet definition of a scaled diagram. If the drawing is a scaled diagram, the scale must be present.

1.5.1.3. A legend or key – used to identify objects and reference points included in the sketch.

1.5.1.4. A title block – must contain the following necessary data to authenticate the sketch: 1.5.1.4.1. Title 1.5.1.4.2. Forensic Case number and/or requesting agency incident number 1.5.1.4.3. Date of diagram 1.5.1.4.4. Location of incident or location of diagram


Crime Scene Unit Trace Evidence



Evidence Collection Division 1. Trace Evidence

1.1. Scope

1.1.1. Crime Scene personnel are responsible for collecting trace evidence such as hair, fibers, glass, paint, soil, and chemicals present at a crime scene, suspects and/or witnesses. The Medical Examiner’s office has jurisdiction over any evidence located on the decedent and will recover it or give permission for it to be recovered by CSI. If trace evidence is seen on a decedent, the CSI is obligated to discuss the evidence with the medical examiner investigator to devise the best manner to ensure its collection.

1.2. Hair and Fiber Evidence Collection

1.2.1. Equipment • Glassine envelopes • Tweezers • Razor blade/scalpels • Paper envelopes • Forensic Light Source • Sticky Notes • Hinge lifts

1.3. Examination Methods

1.3.1. Visual inspection using flashlight with oblique lighting. 1.3.2. Visual inspection using Forensic Light Source.

1.4. Sample Selection of Unknown Standards

1.4.1. On substrates where trace evidence is observed, all unknown samples should be collected 1.5. Collection Methods

1.5.1. All evidence should be photographed prior to collection. 1.5.2. Objects with hair or fiber firmly attached:

1.5.2.1. Carefully collect the entire object, if possible, and package the object in such a way that the hair or fiber will not become dislodged.

1.5.3. Objects with hair or fiber not firmly attached: 1.5.3.1. Note the location and photograph the hair/fiber in place. 1.5.3.2. Carefully remove the hair/fiber using gloved fingers or a pair of tweezers. 1.5.3.3. Package the hair/fiber inside a glassine envelope or paper bindle.

1.5.4. Large Areas (e.g., vehicles/mattresses/floors etc.) 1.5.4.1. A visual search of the area should be conducted first.

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1.5.4.2. Section off the area (e.g. driver’s seat, passenger seat, shirt, pants) and use one hinge lifter per area. Each hinge lift should then be properly marked immediately with identifying information.

1.5.4.3. Package the hinge lifts from each area individually and in a fully sealed container. 1.5.5. If the trace evidence is securely attached to an object and cannot be easily removed, then

the entire object or portion containing the trace evidence can be collected.

1.6. Collection of Known Standards 1.6.1. Crime scene investigators should always consider search and seizure statutes when

collecting known standards and whether possible trace evidence (victim’s hair, etc.) has been collected beforehand. Identification photos of the subject should be obtained prior to collection and the subject’s identifying information noted on the container. The following collection methods should be utilized:

1.6.2. Head Hair 1.6.2.1. A representative sample of approximately 10 hairs from each area should be

collected. 1.6.2.2. The samples should be taken from the top left, top right, center, lower left and

lower right sides of the scalp. 1.6.2.3. The hair should be pulled as close to the root as possible without stretching the hair. 1.6.2.4. If head hair is too short to be pulled, it may be cut as closely to the scalp as possible

(with proper notation). 1.6.2.5. Package the hair separately by area inside glassine envelopes or paper bindles. 1.6.2.6. Properly mark the package with the appropriate area and information.

1.6.3. Pubic Hair

1.6.3.1. A representative sample of approximately 15-20 hairs total should be collected. 1.6.3.2. The hair should be pulled as close to the root as possible without stretching the hair. 1.6.3.3. Package inside a glassine envelope or paper bindle. 1.6.3.4. Properly mark the package with the appropriate area and information.

1.6.4. Other Body Hair Standards

1.6.4.1. A representative sample of approximately 20 hairs total should be collected from each desired area.

1.6.4.2. The hair should be pulled as close to the root as possible without stretching the hair. 1.6.4.3. Package the hair separately by area inside glassine envelopes or paper bindles. 1.6.4.4. Properly mark the package with the appropriate area and information




1.6.5. Carpet Fiber Standards 1.6.5.1. A representative sample of the carpet should be collected so that the fiber

types/colors/wear are represented. 1.6.5.2. Include stained/unstained areas and faded/un non-faded areas as well as areas

which have different wear patterns and treatment. 1.6.5.3. The fibers should be cut as close to the backing as possible. 1.6.5.4. Package the fibers separately by area inside glassine envelopes or paper bindles 1.6.5.5. Properly mark the package with the appropriate area and information.

1.7. Glass Collection

1.7.1. Crime scene investigators are responsible for collecting glass evidence which may be present at crime scenes, where windows, automobile glass, bottles, and other glass objects have been broken. Glass evidence can assist in the reconstruction of crime scenes.

1.7.2. Sample Selection 1.7.2.1. On those substrates where glass evidence is observed, unknown samples should be

collected at the discretion of the crime scene investigator. 1.7.3. Collection Methods

1.7.3.1. Objects with glass firmly attached: 1.7.3.1.1. Carefully collect the entire object and package it in such a way that the glass

will not become dislodged. 1.7.3.1.2. Properly package and mark with the appropriate information.

1.7.4. Objects with glass not firmly attached: 1.7.4.1. Carefully remove the glass using gloved fingers or a pair of tweezers. 1.7.4.2. Place the glass inside a glassine envelope or paper bindle. 1.7.4.3. Properly package and mark with the appropriate information.

1.7.5. Clothing/Shoes (e.g. hit and run suspect/victim) 1.7.5.1. Collect the item containing the evidence (shirt, shoes, etc.) 1.7.5.2. Glass evidence on clothing or shoes may be microscopic. 1.7.5.3. Wrap each individual item in paper if possible. 1.7.5.4. Package in a paper bag and mark with the appropriate information.

1.7.6. Glass Items (e.g., light bulbs, bottles, etc.) 1.7.6.1. Carefully remove the glass item using gloved fingers. 1.7.6.2. Properly package the item in a paper bag within a cardboard box.

1.7.7. Known Standards 1.7.7.1. For a comparison standard, collect as much as possible of the broken glass. 1.7.7.2. If the glass is being used to determine the direction of impact, document which side

was outside. 1.7.7.3. Package separately from questioned samples.




1.8. Paint Evidence Collection 1.8.1. Crime scene investigators are responsible for the documentation and collection of paint

evidence which may be present at crime scenes such as homicides and burglaries. 1.8.2. Sample Selection

1.8.2.1. On those substrates where paint evidence is observed, unknown samples should be collected at the discretion of the crime scene investigator.

1.8.3. Collection Method 1.8.3.1. Note the location of the paint. 1.8.3.2. When possible, collect the entire object and package it in such a way that the paint

will not become dislodged. 1.8.3.3. When unable to collect the entire object, use a clean scalpel or knife blade to

carefully scrape the paint sample into a glassine envelope or paper bindle. 1.8.3.4. When collecting a paint sample from a vehicle, a sample from each area of damage

should be collected. 1.8.3.5. The sample should include all layers down to the bare metal or wood. 1.8.3.6. Samples from different areas should be collected and packaged separately. 1.8.3.7. Clothing items/shoes (e.g., suspected/possible hit and run victim) with paint

transfer should be wrapped in paper first, then placed in a paper bag. 1.8.4. Known Standards

1.8.4.1. Obtain a known paint sample in close proximity to the unknown sample. 1.8.4.2. The sample should include all layers down to the bare metal or wood. 1.8.4.3. The sample should be collected and packaged in the same manner as previously

mentioned.

1.9. Soil Evidence Collection 1.9.1. Crime scene investigators are responsible for collecting soil evidence which may be

present at crime scenes such as homicides, sexual assaults, and burglaries. 1.9.2. Sample Selection

1.9.2.1. On those substrates where soil evidence is observed, unknown samples should be collected at the discretion of the crime scene investigator.

1.9.3. Collection Methods 1.9.3.1. Soil from impressions

1.9.3.1.1. Complete casting prior to collection of soil. 1.9.3.1.2. Soil will adhere to the cast. This can be used as your sample. Do not attempt

to clean the cast by removing the soil. 1.9.3.1.3. Air dry the cast for 48 hours and ensure the soil is dry. 1.9.3.1.4. Package the cast in a paper container to ensure it will not be damaged.

1.9.3.2. Soil from clothing or shoes




1.9.3.2.1. Collect the clothing or shoe if possible and wrap each individually in paper. 1.9.3.2.2. Ensure both the clothing/shoes and the soil are dried before packaging. 1.9.3.2.3. Package in paper container and mark it with the appropriate information.

1.9.3.3. Unknown soil sample 1.9.3.3.1. Collect the sample in such a way that it will be allowed to air dry. A

recommended method is a paper bindle that can be folded to secure the sample.

1.9.3.3.2. Once the soil is dry, it can be packaged. Mark the package with the appropriate information such as location soil obtained from, date, and name of crime scene investigator collecting the sample.

1.9.3.4. Known standards 1.9.3.4.1. Collect at least three samples of soil (one half to one cup) from each area of

interest or under and around the location a victim’s body was located, etc. 1.9.3.4.2. Samples should be collected from the top one quarter inch of the surface soil

and be representative of the soil types in the area. 1.9.3.4.3. The samples should be collected in such a way that they will be allowed to air

dry. A recommended method is a paper bindle that can be folded to secure the sample.

1.9.3.4.4. Once the sample is dry, it can be packaged. Mark the package with the appropriate information to include the location it was collected, the date, and the name of the crime scene investigator that collected the sample.

1.10. References

1.10.1. Scientific Working Group on Material Analysis (SWGMAT). 1998. Trace Evidence Recovery Guidelines.

1.10.2. Fisher BAJ. 1992. Techniques of crime scene investigation. 5th ed. New York (NY); Elsevier Science Publishing Co., Inc.


Crime Scene Unit Videotaping Crime Scenes


Crime Scene Unit Videotaping Crime Scenes Evidence Collection Division

1. Videotaping Crime Scenes

1.1. Scope

1.1.1. The word “Videotaping” is a generic term used to reference the capture of a sequential series of digital photo images that can be played back to provide a moving progressive movie. It does not actually use or require videotape. Any reference to videotape in this manual will refer to a series of digital images. The Crime Scene Unit provides digital video documentation of all homicide scenes and officer involved incidents, unless this service is not wanted by the requesting agency. Other scenes will be recorded if necessary or requested by the crime scene investigator, crime scene supervisor, police investigator, or requesting agency liaison. A video recording of a crime scene will be used in conjunction with digital photographs to document the scene.

1.2. Equipment 1.2.1. Camcorder, video recorder or video capable DSLR camera.

1.2.1.1. All scenes requiring video documentation will be completed with a camcorder unless otherwise approved.

1.2.2. Lithium Battery 1.2.3. Light Source 1.2.4. DVD/CD or memory card as applicable.

1.3. Procedures for videotaping

1.3.1. Conducting a Scene Video 1.3.1.1. A cover sheet with the following information will be completed:

• Case Number • CSU Investigator Name • Location of Incident • Date

1.3.2. Prior to video recording, insert the sound plug or turn off the sound microphone. 1.3.3. Video camera functionality can be checked by pan in/out using the W/T button in the

camera, external light source turns on, and/or record indicator is visible and indicates recording, after this check the camera is ready to proceed with recording.

1.3.4. Begin the recording by turning on the light source if applicable and record the cover sheet for the first five to ten seconds of the footage. Once recording begins, there should be no stops or pauses until the entire scene is documented and recorded.

1.3.5. Record the scene beginning with a slow 360 degree pan of the exterior of the scene. Record the entire scene including overalls, mid-range, and close-ups of evidence known or visible at the time of recording.

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Crime Scene Unit Videotaping Crime Scenes Evidence Collection Division

1.3.6. Walk slowly, pan slowly, and use the zoom feature slowly while recording. 1.3.7. When recording items close-up, zoom in slowly, record the item remaining still for 10

seconds, and zoom out slowly before moving to the next item. Pausing for 10 seconds gives the viewer time to recognize and absorb what they are seeing and allows time for narrations describing the item on the witness stand.

1.4. Transferring the Scene Video from the Camera to other Media:

1.4.1. Typically, when the scene video is made, it is recorded on the video camera’s internal memory or to an externally inserted flash card (SD, SDHC, or other type).

1.4.2. The scene video must be transferred from the camera/external memory to either a CD, DVD, other media, or applicable data storage/archival location (e.g. Mideo, Foray, etc.) depending on the file size of the video.

1.4.3. In most instances, once the entire scene has been recorded, the recording will be transferred onto an evidence grade DVD-R for permanent storage. The CSI conducting the transfer will review the DVD to ensure the recording transfer was successful and that the scene recording is on the DVD. This DVD will become part of the case record.

1.4.4. A copy of the scene DVD will be made for the investigator or requesting agency liaison. 1.4.5. The video should be transferred at the highest visual quality (SD, HD, 4K, etc.) possible

depending on the size of the storage mediums available. 1.4.6. If the storage medium is a data storage system such as Mideo, Foray, etc., then the video

will be transferred at the highest quality possible.

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