Final answer:
The Locard principle states that every contact leaves a trace. It explains how perpetrators leave behind and carry away evidence from a crime scene. This principle helps forensic scientists analyze evidence to solve crimes.
Step-by-step explanation:
The Locard principle, named after forensic scientist Edmond Locard, states that every contact leaves a trace. This principle suggests that during the commission of a crime, the perpetrator will leave behind physical evidence at the crime scene, and they will also carry away evidence from the scene on their person or belongings. This forms the basis for analyzing and comparing evidence to help solve crimes.
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