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14 Cards in this Set
- Front
- Back
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Friction Ridge Skin
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a.k.a. fingerprinting
Pattern of ridges and valleys found on the palm sides of your hands and bottoms of your feet |
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How are fingerprints left?
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body oils or amino acids found naturally in the person's skin; oils leave a copy of the ridges on many materials
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Advantage of Friction Ridge Skin Identification
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each person has a completely unique print
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Influences on your Print
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genes determine basic characteristics of the ridge patters; microenvironment of the growing cells in the womb affects how prints develop
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How to lift a fingerprint
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-Dust carbon powder on print using a light brish
-Use tape called lifter to remove any prints illuminated by powder -Place tape on a black or white card to display print |
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A.F.I.S.
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Automated Fingerprint Identification Systems: computers that can compare a single print to thousands of prints in a database
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Identification
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the process of determining that an object is a member of a group with similar characteristics
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Individualization
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the process of identifying what differentiats one specific print from all other prints
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Minutiae
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tiny points in the ridge pattern that identify a print
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Bifurcation
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where the ridge splits into two ridges
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Ridge Ending
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where a ridge ends
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Why Controversial?
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No uniform standard for establishing if a match exists
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Nine Classes of Fingerprints
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Arch, Tentarch, Right Loop, Left Loop, Double Loop, Right Pocket Loop, Left Pocket Loop, Whorl, and Mixed Figure
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Whose print was found and what was its class?
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Jeff Knight's right middle fingerprint was found and determined to be a right loop
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