FORENSIC QUOTE

Paul Leland Kirk (May 9, 1902 – June 5, 1970) was a chemistforensic scientist and participant in the Manhattan Project who was specialized in microscopy. He quoted in his book on Dr. Edmond Locard’s famous

PRINCIPLE OF EXCHANGE



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 marks 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 perjure itself, it cannot be wholly absent. Only human failure to find it, study and understand it, can diminish its value
— Paul L. Kirk, from his book: Crime Investigation: Physical Evidence and the Police Laboratory (Published in 1953)

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