Question

what is forensic science? write the principle of Locard​

Answer 1

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. ... He formulated the basic principle of forensic science as: "Every contact leaves a trace".

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Answer 2

Forensic science :

Forensic science, also known as criminalistics, is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal procedure.

Locard's principle:

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. He formulated the basic principle of forensic science as: "Every contact leaves a trace". ..