Fingerprint Evidence Flashcards by Heleyna Godfrey

Q

Fingerprint Biology

A

friction ridges (hills) and furrows (valleys) with pores on ridges
develop in utero due to fluid movement
completely unique

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Q

Levels of Detail

A

1: basic pattern (whorl, loop, arch)
2: Minutiae (termination, bifurcation, island)
3: ridge dimensions and pore location

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Q

AFIS

A

Automatic fingerprint ID systems
assist examiners, does not replace them
not always conclusive on partials

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Q

Types of Prints

A

patent (visible)
plastic (impression)
latent (not-visible)

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Q

Fingerprint Residues

A

substances from eccrine, sweat and other fluid glands
affected by rate of sweat, diet, age, sex, stress
no way to date except for like newspapers

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Q

Non-Porous Substrates

A

Plastic, glass or metals
powder, glue or metal deposition
fluorescent powder used after glue fuming

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Q

Porous Substrates

A

paper, wood
absorb residue, need chemicals to penetrate
Ninhydrin, DFO, Indanedione

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Q

ID

A

ACE-V: analysis, comparison, evaluation, verification

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Q

Beyond Fingerprints

A

some databases include palm and tongue prints
palm prints make up 30% of latent

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