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26 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Front (Term) Palmar |
Back (Definition) Surface of hands |
Surface |
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Front (Term) Plantar |
Back (Definition) Surface of feet |
Surface |
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Front (Term) Friction Ridge Skin (FRS) |
Back (Definition) Raised skin - finger print ridges that make pattern |
Prints |
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Finger Print |
Taken from a person as a print. Already known person is and entered into the database |
Station prints |
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Finger Marks |
Unknown persons finger print left on an item or surface to be identified |
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Name and explain 3 Different marks |
Patent marks - visible e.g in blood or paint
Plastic Marks - negative ridge impression made in soft material e.g putty
Latent Marks - not visible by eye, needs enhancement |
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Fingerprint Database |
IDENT 1 |
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Name 3 glands responsible for secretion |
Eccrine gland Apocrine gland Sebaceous gland |
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Sebaceous glands are not on the palms of hands or feet but sebaceous secretion will still be found in finger prints, why? |
We are always touching other parts of our body that do secrete sebaceous material |
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How many Galton levels are there? |
Three |
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What is Galton level one? |
General ridge pattern - arches, whorls and loops |
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What is Galton level two? |
Minutiae: Ridge endings Bifurcation Dot Island Lake Hook Bridge Double bifurcation Trifurcation Opposed bifurcations Ridge crossing Opposed bifurcation/ridge ending |
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What is Galton level three? |
Ridgeology - looking at individual ridges e.g width, pore location |
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What does ACE-V stand for? |
Analysis Comparison Evaluation- Verification |
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What system is in place to assure finger mark analysis standards are high? |
Minimum of two experts must agree on findings |
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What are the four enhancement categories? |
Optical Physical Physical / Chemical Chemical |
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What are optical enhancements? |
Laser UV light source Infrared |
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What are physical enhancements? |
Powdering Vacuum Metal Disposition (VMD) Small Partical Reagent (SPR) |
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What are Physical/Chemical enhancements? |
Cyanoacrylate fuming (glue) |
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What are the Chemical enhancements? |
Ninhydrin DFO (diazaflouren-9-one) Iodine Sudan Black (Solvent Black 3) Amido Black (Acid Black) |
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Ninhydrin reaction colour
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Ninhydrin, under theright conditions, produces an intensely coloured product called‘Ruhemann’s purple’ after the discoverer
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DOF reaction colour
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Pale pink, extremely flourescent
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Ninydrin (Ruhemanns Purple) can be made to fluoresce with what?
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Ruhemann’s purple can be made to fluoresce bycomplexing it with metal salts and will react at room temperture provided moisture is available. Works faster in warm and humid environments.
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What can be done to use fluorescence to enhance fingermarks in blood?
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There are two ways this maybe achieved:
- by exciting fluorescence of the background surface on which theblood is deposited; - by treatment with a process that either breaks the haem group orturns the blood into a fluorescent species, or does both of these. |
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Is fluorescence a destructive technique?
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No. It is non-destructive.
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What colour light will excite DFO?
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DFO produces fluorescent species with blood, which can be excited bygreen (510–570nm) light
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