fingerprints. anthropometry flaws: body measurements change! too time consuming
TRANSCRIPT
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Fingerprints
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AnthropometryFlaws:
body measurements change!
Too time consuming
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Will West William West
•Two prisoners
•Unrelated!!!
•Body measurements too similiar
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English civil servant
Right hand imprints
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Said skin ridge patterns could identify individual
He was ignored
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• Published Finger Prints (1st book on the topic)
• Developed principles
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Classification system
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1901 – NYC Civil Service Commission
1924 – Bureau of Investigation and Leavenworth merged – FBI
1999 – US v. Byron C. Mitchell Fingerprints challenged Judge upheld ruling
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1. A fingerprint is an individual characteristic. No two fingers possess identical ridge characteristics.
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2. A Fingerprint remains unchanged during an individual’s lifetime
• Develop in the fetus
• Dermal papillae – between epidermis and dermis
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John Dillinger
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3. Fingerprints have three general ridge patterns that can be classified.
• Loops
• Whorls
• Arches
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Enter and exit same side
A. Ulnar Loop pinky
B. Radial Loop thumb
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Ridge patterns that are somewhat circular in nature
A. Plain Whorls one ridge makes complete circuit
spiral, oval, or circular
B. Central Pocket Loop, Double Loop, Accidental
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Ridge patterns that enteron one side of the finger and exit on the other
A. Plain Arch wave-like, in one end – out the other
B. Tented Arch sharp rise
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