CHEM 207 - Trace Evidence - The Mute Witness

CHEM 207 - Trace Evidence - The Mute Witness - 2 Examples...

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1 Trace Evidence Trace Evidence The Mute Witness The Mute Witness Trace definition Trace definition A generic term for small, often microscopic, fragments of various types of materials that transfer between people, places and objects, and persist there for a time. Value of Trace Evidence Value of Trace Evidence Not weak evidence Trace may tell you “what”, “where”, “how”, and “when”, more than DNA which only answers “Who?” Value of Trace Evidence Value of Trace Evidence Case reviews have been chosen to demonstrate the strength and breath of Trace in criminal investigation. Trace Evidence Examples Trace Evidence Examples Fibers Paints Glass Hair Soil Feathers Metal Brick Dust Sand Pollen Sawdust Vegetation Can you add any? Examples Examples PDF Created with deskPDF TS PDF Writer - DEMO :: http://www.docudesk.com
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Unformatted text preview: 2 Examples Examples Paul Kirk in text, Paul Kirk in text, Criminal Criminal Investigation Investigation microscopic evidence is present in most cases, and is therefore of much wider availability. If there is a single important lesson to be learned by the investigator, it is the extent to which he may rely on microscopic physical evidence if he is willing to make full use of it. Trace Evidence, cont. Majority of forensic evidence is trace. Blood on a wall, fingerprint on a knife, GSR on a wound, tire impression in mud. Just like Pig Pen in the cartoon Peanuts, we all carry around trace evidence with us as we interact with the environment. PDF Created with deskPDF TS PDF Writer - DEMO :: http://www.docudesk.com...
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This note was uploaded on 02/03/2012 for the course CHEM 207 taught by Professor Bacon during the Fall '11 term at Ferris State.

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CHEM 207 - Trace Evidence - The Mute Witness - 2 Examples...

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