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Evaluation of ALS Camera Systems in documentation of Fingerprint Evidence
Jiaqi Max Lu, M.S.; Ran Chang, M.S.; Tianyin Yu, M.S.; Henry C. Lee, Ph.D.
Photography
Visual Examination
Photography
Enhancement Methods
PhysicalMethods
ChemicalMethods
LuminescenceMethods
ALS attachable DSLR system Current hand held ALS device with DSLR
ALS attachable DSLR systemCurrent hand held ALS device
with DSLRDominant
Output(nm)Maximum
Light Intensity(mW)
Dominant Output(nm)
Maximum Light
Intensity(mW)Ultra Violet 365
700-1200400 650
Purple 415 N/A N/ABlue 470 450 2000
Green 525 525 730
Equipmenttype
Lightsource
Enhancement Methods
Powder Amino Acid Cyanoacrylate Fuming Blood Reagent
Latent Prints Process with Powder Method
Powder
Powder Silk Black/Clear Glass BottleA. New System B. Traditional System
Powder
Powder Coin Box Galvanic/Colored Glass BottleA. New System B. Traditional System
Powder
Magnetic Powder White/Dark Glass BottleA. New System B. Traditional System
Powder
Powder White/Multi-color Painted CanA. New System B. Traditional System
Powder
Powder Silver Red/Metal Pot LidA. New System B. Traditional System
Powder
Magnetic Powder Regular Black/Clear Plastic BottleA. New System B. Traditional System
Powder
Magnetic Powder Regular Black/Golf BallA. New System B. Traditional System
Powder
Magnetic Powder White/Multi-color Plastic LabelA. New System B. Traditional System
Powder
Magnetic Powder Silver Black/White Plastic BottleA. New System B. Traditional System
Powder
Magnetic Powder Gray/Dark Ceramic BowlA. New System B. Traditional System
Powder
Fluorescent Powder/Glass frameA. New System B. Traditional System
Powder
Fluorescent Powder/Multi-color Metal Soda CanA. New System B. Traditional System
Powder
Sticky Side Wetwop/Tape Sticky SideA. New System B. Traditional System
Powder
Small Particle Reagent Black/Wet GlassA. New System B. Traditional System
Latent Prints Process with Amino Acid Method
Amino Acid
Ninhydrin/Brown PaperA. New System B. Traditional System
Amino Acid
1,2 Idanedione/Thermal PaperA. New System B. Traditional System
Amino Acid
D.F.O/Coated PaperA. New System B. Traditional System
Latent Prints Process with Fuming Method
Fuming
Basic Red 28/Plastic BagA. New System B. Traditional System
Fuming
MBD/Glass BottleA. New System B. Traditional System
Fuming
Rhodamine 6G/Plastic CardA. New System B. Traditional System
Fuming
RAM/Plastic Shotgun ShellA. New System B. Traditional System
Fuming
Ardrox/Wooden FloorA. New System B. Traditional System
Fuming
Ardrox/Metal BoxA. New System B. Traditional System
Fuming
Basic Yellow 40/Ceramic CupA. New System B. Traditional System
Latent Prints Process with Blood Reagent Method
Blood Reagent
Leuco Crystal Violet/TileA. New System B. Traditional System
Blood Reagent
Hungarian Red/Wooden FloorA. New System B. Traditional System
Blood Reagent
Merbromin/Metal Soda CanA. New System B. Traditional System
Blood
Blood/Dark Glass BottleA. New System B. Traditional System
Results
Quality of captured image of evidence
Results
Ease of equipment operation
Results
Manpower requirement for crime scene documentation
Results
Light source illuminating capability
Conclusion
Our results indicate both systems will assist in the recognition and documentation of evidence. For the crime scene search, the external ALS device is more practical, while for documentation, the ALS attached DSLR system has its advantages.
Design for Next Generation
Evidence quality photos direct entry at crime scene
Crime Scene AFIS
New Solution for Energy Issue
D.F.O/Coated Paper1st generation 2nd generation
1st generation 2nd generation1,2 Idanedione/Thermal Paper
Merbromin/Metal Soda Can1st generation 2nd generation
Rhodamine 6G/Plastic Card
1st generation 2nd generation