Every Contact Leaves a Trace

Everyone knows Sherlock Holmes, but most people have not heard of Edward Locard--often referred to as the Sherlock Holmes of France. Locard was a pioneer in the use of forensic science to solve crimes, particularly the science of trace evidence.  He posited that every contact leaves a trace. A criminal always leaves something behind at the scene of a crime s/he commits and takes something from that scene with him/her. ...

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