Term
|
Definition
| surface that does not absorb moisture |
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Term
|
Definition
| surface that absorbs moisture |
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Term
| Summarization of nonporous techniques |
|
Definition
Visual
ALS
Cyanoacrylate
Dye
ALS
Powders |
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Term
| Why is it useful to use sequential processing techniques? |
|
Definition
1. Enhance/ develop latent prints
2. Least destructive--> most destructive |
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Term
| What happens when you complete a visual examination with ambient light? |
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Definition
| Light that is available to teh viewer at the scene without the addition of any illumination device. |
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Term
| What happens when an examination is completed using alternate light with inherent illumination? |
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Definition
| Ability for an item to give off light without the use of chemical/physical processing. Based off material composition, contaminants, or makeup. |
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Term
Describe cyanoacrylate fuming |
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Definition
1. develops prints on nonporous items
2. requires heat, humidity, and an enclosed/ventilated environment
3. superglue fumes adhere to water components of latent and forms white color. |
|
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Term
|
Definition
1. Cup Warmer/Hot Plate and Hot Water
2. Hotshot- self heating for portable crime scene.
3. Sodium Hydroxide & Cotton balls added to superglue. Oxidation to form cyano. fumes
4. Loctite Packets-contained on scene production of prints
5. Vacuum Chamber |
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Term
When is fluorescent dyes useful?
Examples? |
|
Definition
Best used on textured and multicolored surfaces
Ardrox, rhodimine, basic yellow, RAM, RAY, MBD |
|
|
Term
Fluorescent Powders:
Bind?
When useful?
Require?
|
|
Definition
Bind to aqueous and fatty acid deposits on print
Useful on multicolored or textured surfaces
Require ALS visualization |
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Term
|
Definition
Black/ White
Fluorescent
Bichromatic
Magnetic |
|
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Term
|
Definition
Fiberglas- fingerprint powders
Magnetic Wand- Magnetic pwdr
Feather Duster- Fluorescent
Camel Hair Brush- WETWOP |
|
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Term
| Two different types of separation techniques |
|
Definition
1. UNDO
2. Liquid Nitrogen |
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Term
|
Definition
| Reacts with oils and fatty acid components on nonporous items |
|
|
Term
Wet Wop Technique
Can also use sticky side powder |
|
Definition
Reacts with Fatty Acid and Oil Residue
Prints can be lifted AFTER drying process. |
|
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Term
| Sequential techniques for development on POROUS surfaces |
|
Definition
Visual
ALS
Iodine
DFO/Indanedione
ALS
Ninhydrin
Oil Red O
Physical Developer |
|
|
Term
| Iodine Fuming. How does it work? |
|
Definition
Vapor reacts with fats
Corrosive & Toxic
|
|
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Term
|
Definition
Reacts with Amino Acids
Illuminated with ALS appears magenta or yellow
Can develop impressions in blood |
|
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Term
| How does Indanedione work? |
|
Definition
Reacts with amino acids
Doesn't develop great colored impressions first, but forms pink color under ambient light. 530 nm strong fluorescence. |
|
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Term
|
Definition
spray or dip evidence
air dry
heat for 10 minutes at 100 degrees
view under 530 nm with ALS
Store in dark area |
|
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Term
|
Definition
Reacts with amino acids
need heat and humidity
will detect prints years old
Will develop prints in blood |
|
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Term
|
Definition
Lipid stain by oils, cosmetics, and other fatty substances.
Good for evidence that was once wet
Produces better clarity than PD and is easy to use. |
|
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Term
|
Definition
"wet" process which reacts with oils and salts and forms silver color
Effective for developing impressions on paper that have been wet
|
|
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Term
| Blood enhancement techniques |
|
Definition
Amido black
O-Tolidine
Leucocrystal violet (LCV) |
|
|
Term
| Golden rule for DNA and fingerprint development. |
|
Definition
| Any development technique prior to DNA analysis with exception of dipping, rinsing, or submerging. |
|
|
Term
Who is the father of light energy and what did he do? |
|
Definition
Dr. Ronald Menzel
Used argon lasers for use in crime scene applications |
|
|
Term
| Short wavelength= ________ energy |
|
Definition
|
|
Term
UV------V-I-B-G-Y-O-R--------IR
More energy----------------High WL |
|
Definition
|
|
Term
| What is the goal of using a forensic light source? |
|
Definition
| Achieve ultimate contrast with print and background. |
|
|
Term
| What do goggles do with ALS? |
|
Definition
1. Block emission of projected light
2. Filter excitation source and allow fluorescent color to pass through.
Clear & Amber (UV), Orange, Red (IR) |
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Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
the property of absorbing light of short wavelength and emitting light of longer wavelength. |
|
|
Term
|
Definition
o UV – protect eyes and skin
o Violet, blue, and blue green – protect eyes
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|
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Term
|
Definition
| a search tool that allows you to search an unknown print against known inked fingerprints, knowned inked palm prints, and unsolved latents. |
|
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Term
|
Definition
| Leading provider of AFIS and other ingerprint biometric systems to law enforcement agencies worldwide. Most accurate systems in world with rapid response times (15k-500k/second) |
|
|
Term
| CT State AFIS system, describe |
|
Definition
| Combined with RI and houses over 3 million sets of inked prints & over 2 thousand unsolved and palm print sets. Searches criminal and applicant files in both states. |
|
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Term
| Basic Methodology of AFIS search? |
|
Definition
Latent vs. Ten print
Latent vs. Unsolved latent. |
|
|
Term
| Search Criteria for AFIS? |
|
Definition
Gender
Fingerprint, Multiple FGP, Hand?
One Pattern, 2 pattern, unknown?
|
|
|
Term
| How many points should you mark out for AFIS? |
|
Definition
|
|
Term
|
Definition
- IAFIS only used to search one state at a time
- Increased latent print search accuracy by 3x
- ability to search latent palm prints against national system. State agencies are now allowed to submit their palm prints with arrests.
- Stores unsolved latents
- Searches criminal and civil repositories
- Ability to search specific geographical locations
|
|
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Term
| What does AFIS stand for? |
|
Definition
| Automated Fingerprint Identification System |
|
|
Term
| What does IAFIS stand for? |
|
Definition
| Integrated Automated Fingerprint Identification System |
|
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Term
|
Definition
Subject is not in AFIS
Poor Quality Latent
Known impression is poor quality
latent is outside the area cover by standard FGP cards
|
|
|
Term
| How do biometric scanners work? |
|
Definition
Take image
Identify ridge characteristics
Measures distance between, and gives a number.
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