Eileen730
Former Member
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Touch DNA, imo..
Evidence
One of the most important factors in determining the cause of a crime is the evidence left behind at the scene. Perhaps a quote from well-known criminologist Edmond Locard best describes the forensic approach to gathering evidence. His motto of "Every contact leaves a trace" suggests that all criminals leave behind some clue and take with them some evidence that links them to the crime.
Read more: How Is Forensic Science Used to Solve Crimes? | eHow.com http://www.ehow.com/how-does_5128441_forensic-science-used-solve-crimes.html#ixzz2A3wJUGBa
Could she have scratched him?