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The Locard exchange principle | by RichTatum
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The Locard exchange principle

"Wherever he steps, whatever he touches, whatever he leaves, even unconsciously, will serve as a silent witness against him. Not only his fingerprints or his footprints, but his hair, the fibers from his clothes, the glass he breaks, the tool mark he leaves, the paint he scratches, the blood or semen he deposits or collects. All of these and more, bear mute witness against him. This is evidence that does not forget. It is not confused by the excitement of the moment. It is not absent because human witnesses are. It is factual evidence. Physical evidence cannot be wrong, it cannot perjure itself, it cannot be wholly absent. Only human failure to find it, study and understand it, can diminish its value."


-- Professor Edmond Locard


After I was dropped off at my hotel Sunday afternoon in Madison, Tennesee, I put on my comfortable clothes and headed out to see if I could shoot some stuff under cloud-cover.


As I wandered around the neighborhood, I noticed some of the concrete pilings that hold up the overpass had handprints and smudges on them.


Don't know who left 'em there, or if they even did it on purpose, but I thought it was pretty cool.





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Taken on September 9, 2007