Locard's exchange principle

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Science and technology

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What Wikipedia says

In forensic science, Locard's principle holds that the perpetrator of a crime will bring something into the crime scene and leave with something from it, and that both can be used as forensic evidence. Edmond Locard (1877–1966) was a pioneer in forensic science who became known as the Sherlock Holmes of Lyon, France.

Excerpt from the Wikipedia article “Locard's exchange principle”, under the CC BY-SA 4.0 license. Read the article on Wikipedia