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What is “locard’s exchange principle” in forensic science?

Retry Correct Incorrect Locard’s Exchange Principle says that when individuals interact, they leave and take traces. Criminals transfer evidence to scenes, and scenes provide evidence to them, aiding investigations through trace analysis. Pretty neat, huh?

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CBS via MovieStillsDb

CBS via MovieStillsDb

What is “locard’s exchange principle” in forensic science?

• A technique for collecting hair and fiber samples
• A principle related to witness interviews
• The idea that evidence is always transferred between crime scenes
• The concept of exchanging evidence with suspects during an investigation