unit 6: fingerprinting

29
Unit 6: Fingerprinting

Upload: adamma

Post on 24-Feb-2016

24 views

Category:

Documents


0 download

DESCRIPTION

Unit 6: Fingerprinting. Objective : SWBAT debate the value of the Bertillion measurement system . Do Now : Are fingerprints class or individual? Direct or circumstantial?. Objective : SWBAT debate the value of the Bertillion measurement system . - PowerPoint PPT Presentation

TRANSCRIPT

Page 1: Unit 6: Fingerprinting

Unit 6: Fingerprinting

Page 2: Unit 6: Fingerprinting

Objective: SWBAT debate the value of the Bertillion measurement system

Do Now: Are fingerprints class or individual? Direct or circumstantial?

Page 3: Unit 6: Fingerprinting

Every individual, including identical twins, has a unique fingerprintType of Evidence: Fingerprints are classified as individual evidence

Objective: SWBAT debate the value of the Bertillion measurement system

Cool fact: Fingerprints formed in womb around 10 weeks into pregnancy

Page 4: Unit 6: Fingerprinting

Bertillion Measurements: uses precise measurements of the body to identify an individual

Objective: SWBAT debate the value of the Bertillion measurement system

Page 5: Unit 6: Fingerprinting

Complete Bertillion Measurement Lab and hand it in.Closure: How can this measurement system be useful in solving crimes? Should it be the only evidence used?

Objective: SWBAT debate the value of the Bertillion measurement system

Page 6: Unit 6: Fingerprinting

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Do Now: Look at your own fingerprints. Are all your print patterns the same?

Page 7: Unit 6: Fingerprinting

Types of FingerprintsLOO

PWHORL ARCH

60% 5%35%

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Page 8: Unit 6: Fingerprinting

Arches are the simplest type of fingerprints that are formed by ridges that enter on one side of the print and exit on the other. No deltas are present.

Plain ArchRidges enter on one side and

exit on the other side.

Tented Arches Similar to the plain arch,

but has a spike in the center.

Spike or “tent”

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Page 9: Unit 6: Fingerprinting

Loops must have one delta and one or more ridges that enter and leave on the same side. These patterns are named for their positions related to the radius and ulna bones.

Delta

Ulnar Loop (Right Thumb)

Loop opens toward right or the ulna bone.

Radial Loop (Right Thumb)

Loop opens toward the left or the radial bone.

NOTE: On the left hand, a loop that opens to the left would be an ulnar loop, while one that opens to the right would be a radial loop.

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Page 10: Unit 6: Fingerprinting

Whorls have at least one ridge that makes (or tends to make) a complete circuit. They also have at least two deltas. If a print has more than two deltas, it is most likely an accidental.

Draw a line between the two deltas in the plain and central pocket whorls. If some of the curved ridges touch the line, it is a plain whorl. If none of the center core touches the line, it is a central pocket whorl.

Plain Whorl

Central Pocket Whorl

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Page 11: Unit 6: Fingerprinting

Accidental Whorl

Accidental whorls contain two or more patterns (not including the plain arch), or does not clearly fall under any of the other categories.

Double Loop Whorl

Double loop whorls are made up of any two loops combined into one print.

Delta

Delta

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Page 12: Unit 6: Fingerprinting

Closure: Identify each fingerprint pattern.

?A B

CD ERight Hand

Left Hand

Left Hand

Right Hand

Right Hand

Page 13: Unit 6: Fingerprinting

• Complete Part 1 of “Sticky Fingers Lab” and hand it in.

• Closure: When observing a random fingerprint, which pattern will you expect to see most often?

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Page 14: Unit 6: Fingerprinting

Do Now: Which is the most common type of pattern in fingerprints?http://www.youtube.com/watch?v=d7N-4UNAzswComplete fingerprint identification card “10 card” activity.Closure: What pattern do you have the most of: loops, whirls, or arches?

Objective: SWBAT identify patterns in their own fingerprints used in

comparisons.

Page 15: Unit 6: Fingerprinting

Do Now: could scars on your fingers show up on a finger print? Could they be used to identify a person?

Objective: SWBAT identify patterns in their own fingerprints used in

comparisons.

Page 16: Unit 6: Fingerprinting

16

Ridge CharacteristicsMinutiae—characteristics of ridge patterns

Objective: SWBAT identify patterns in their own fingerprints used in

comparisons.

Page 17: Unit 6: Fingerprinting

17

Example

Objective: SWBAT identify patterns in their own fingerprints used in

comparisons.

Page 18: Unit 6: Fingerprinting

Comparison There are no legal

requirements in the United States on the number of points required for a match. Generally, criminal courts will accept 8 to 12 points of similarity.

Objective: SWBAT identify patterns in their own fingerprints used in

comparisons.

Page 19: Unit 6: Fingerprinting

Complete Part 2 of “sticky fingers lab” and hand it in.Closure: Why is it so important to identify multiple points such as dots or bridges in a fingerprint?

Objective: SWBAT identify patterns in their own fingerprints used in

comparisons.

Page 20: Unit 6: Fingerprinting

Do Now: Why do we have fingerprints?Complete the “Identification of Minutiae” activity. Hand it in.Closure: What type of pattern is the easiest for you to spot in a print?

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Page 21: Unit 6: Fingerprinting

Do Now: What causes fingers to leave a print behind?Complete fingerprint challenge. Hand it in.Closure: What surfaces do prints cling to the easiest? Why?

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

 Koalas have ridges on their fingers which create fingerprints almost identical to those of human beings. According to a number of websites, this means that koala fingerprints could be confused for human fingerprints at a crime scene. However, koalas have two thumbs on each hand.. Human beings have ridges over all of their palms, whereas koalas only have ridges over part of their palms.

Page 22: Unit 6: Fingerprinting

Do Now: Can you change your fingerprint by burning or scraping them?Complete “The Mayfield Affair” case study. Hand it in.Closure: How do you think the FBI can make their fingerprinting analysis more effective?

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Page 23: Unit 6: Fingerprinting

Do Now: Why can’t fingerprints be lifted from cloth?Developing Prints by dusting with Powder: http://www.youtube.com/watch?v=tqFzVfPRd5s

Objective: SWBAT research ways to pick up fingerprints.

Page 24: Unit 6: Fingerprinting

Lifting prints off hard nonporous surfaces (super glue fuming) such as glass and plastic: http://www.youtube.com/watch?v=R0e8WXkFA64

Objective: SWBAT research ways to pick up fingerprints.

Page 25: Unit 6: Fingerprinting

• Iodine Fuming for lifting prints of paper: http://www.youtube.com/watch?v=SQ9dYQ_OSPg

Objective: SWBAT research ways to pick up fingerprints.

Page 26: Unit 6: Fingerprinting

Complete Dusting/Lifting Print Activity and hand it in.Closure: The FBI’s fingerprint database is the largest in the world; because they (FBI) receives 34,000 fingerprint cards every day. It has 10 times more data than that on DNA. What are some reasons fingerprints could be taken?

Objective: SWBAT research ways to pick up fingerprints.

Page 27: Unit 6: Fingerprinting

Do Now: Experts say that an Egyptian mummy still has very clear fingerprints even if they were embalmed years ago. How can this fact be useful if you are investigating a cold case?Complete case study on James Earl Ray.http://www.youtube.com/watch?v=-bZ-Vdhnno8http://www.youtube.com/watch?v=v6u98z9MiwYClosure: Explain whether you think James Earl Ray would have been convicted if no fingerprints were found on the gun.

Objective: SWBAT research ways to pick up fingerprints.

Page 28: Unit 6: Fingerprinting

Do Now: As humans get identified through their fingerprints, cats and dogs are by their nose prints. How could this be useful in a crime scene?Complete Fingerprint Matching ActivityClosure: How many different “points of interest” on a finger print should be necessary to link a suspect to a crime.

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.

Page 29: Unit 6: Fingerprinting

Do Now: List a few ways to pick up prints at a crime scene.Complete Latent Fingerprints Lab and hand it in.Closure: The iPhone 5s uses fingerprint scans to unlock the phone. Could this eventually infringe on our privacy rights?

Objective: SWBAT identify the types of fingerprint patterns in order to determine

similar prints.