- Slides: 17
History of Fingerprinting • 1924 in 1924, an act of congress established the Identification Division of the FBI. The National Bureau and Leavenworth consolidated to form the nucleus of the FBI fingerprint files.
AFIS-Automated Fingerprint Identification System • The FBI’S Integrated Automated Fingerprint Identification System (IAFIS) in Clarksburg, WV has more than 40 million individual computerized fingerprints records for known criminals
Fingerprints • Form around 5 months gestation • Found in the dermis-middle layer of skin • Formed by the dermal papillae pushing up on the epidermis
3 Types of Fingerprints: Arch, Loop, Whorl • Arch: in an arch pattern, the ridges enter from one side, make a rise in the center and exist primarily on the opposite side.
Loops • In a loop pattern, the ridges enter from either side, re-curve, and pass out or bend to pass out the same side they entered.
Types of Fingerprints at crime scenes • Patent prints: prints easily seen such as left by blood or paint • Plastic prints: found as impressions on wax or grease • Latent prints: not visible to the naked eye.
Classification: plain arch, Tented arch, loop, Plain whorl, central pocket whorl, Double Loop, Accidental R. Thumb______ L. Thumb_____ R. Index_______ L. Index______ R. Middle______ L. Middle______ R. Ring_______ L. Ring_______ R. Little_______ L. Little_______
Agenda 10/1/13 Bell ringer: Application and Critically questions 1 and 2 p. 504. fingerprints are on p. 503 Use p. 480 to answer p. 480 Objective: students will use modified Henry classification system to classify own prints Activity: use page 480 to classify your own fingerprint
Writing prompt • You are a forensic fingerprint identification expert who has been asked to give a expert testimony regarding a homicide in court • R-Role (Expert) • A-Audience (court) • F-Format (report-hypothesis, investigation, analysis and conclusion • T-Task ( determination of case-guilty/nonguilty)
0/15/13 Case Analysis questions p. 98, 1 -5 Due Next Week Friday October 25 Case Reading : Fiber Evidence and the Wayne Williams Trial p. 100 -107
Finger print Analysis • Classify fingerprints as Arch, Loop and Whorl • Match Crime scene fingerprints to one of the suspect • Characterization of CSI slide and suspect, find at least five characters