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FSC 340- Fingerprinting- Week 2- August 30

by: Chelsey Smith

FSC 340- Fingerprinting- Week 2- August 30 FSC 340

Marketplace > University of Southern Mississippi > Forensic Science > FSC 340 > FSC 340 Fingerprinting Week 2 August 30
Chelsey Smith
GPA 3.9
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About this Document

These notes cover the introductory material to fingerprinting
Dr. Dean Bertram
Class Notes
Criminal Justice, forensics, Fingerprinting




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This 3 page Class Notes was uploaded by Chelsey Smith on Friday September 2, 2016. The Class Notes belongs to FSC 340 at University of Southern Mississippi taught by Dr. Dean Bertram in Fall 2016. Since its upload, it has received 50 views. For similar materials see Fingerprinting in Forensic Science at University of Southern Mississippi.


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Date Created: 09/02/16
FSC 340­ Fingerprinting August 30, 2016 Terminology Fingerprints­ patterns of intricate design consisting of friction skin ridges found on the palmar  side of fingers and thumbs Friction skin ridges­ raised portion of skin consisting of veins, capillaries, and sweat glands ◦ Biological purpose: griping ◦ Forensic purpose: identification Why are fingerprints good pieces of evidence? ◦ Unique, individualized evidence, has a 100% certainty ◦ Clean, clear science ◦ No two fingerprints have ever been found to be identical  ◦ FBI has a criminal data bank with constant update of prints ◦ Huge databank­ largest databank in forensics ◦ AVIS­ searches through only criminal fingerprint cards but there’s a better chance of  getting a match ◦ Fingerprints are permanent ◦ Most people commit crimes with their hands ◦ Classifiable, patterns­ arches, loops, whorls ◦ Very teachable subject because it is a familiar concept­ everyone has fingerprints  therefore it’s easier to explain to juries Terminology continued Two types of finger prints ◦ Known print­ print that the person has already been identified­ fingerprint card o Rolled with ink­ image quality is better currently o Live scan­ high resolution scanner­ better for general people to use who are not  trained in fingerprinting ◦ Unknown print­ o Latent print­ unknown fingerprint that’s left by chance at a crime scene­ invisible  to naked eye o Visible latent print­ unknown fingerprint found at crime scene but can visually see it with naked eye o Plastic print­ unknown fingerprint found at the crime scene embedded into  material­ plastic, wax (3D impression) Three Main Principles of Fingerprinting ◦ Unique ◦ Classifiable ◦ Permanent­ formed prior to birth and lasts into stages of decomposition Fingerprint Patterns­ general types of fingerprint patterns ◦ Loops­ most common­ 60% of population o Ulnar loop­ ridge flow to little finger o Radial loop­ ridge flow to thumb ◦ Arches­ only 5% of population patterns are arches­ least common o Plain arch o Tented arch ◦ Whorls­ 35% of population patterns o Plain whorl o Central pocket whorl o Double loop whorl o Accidental whorl ­Dean’s Wise Words: you control your own destiny­


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