Which principle states that "anyone or anything, entering a crime scene takes something of the scene with them, and leaves something of themselves behind when they leave"?

The correct answer is A. Locard's Exchange Principle. Locard's Exchange Principle, formulated by French criminologist Dr. Edmond Locard, is a cornerstone of forensic science. It asserts that every physical contact between a person and a scene results in a two-way transfer of trace evidence - the visitor picks up material from the…

Submitted by rachelw· Apr 18, 2026Computer Forensics Investigation Process

Question

Options

ALocard's Exchange Principle
BEnterprise Theory of Investigation
CLocard's Evidence Principle
DEvidence Theory of Investigation

How the community answered

(30 responses)

A
87% (26)
B
3% (1)
C
7% (2)
D
3% (1)

Explanation

Locard's Exchange Principle, formulated by French criminologist Dr. Edmond Locard, is a cornerstone of forensic science. It asserts that every physical contact between a person and a scene results in a two-way transfer of trace evidence - the visitor picks up material from the scene (e.g., fibers, soil) and deposits material from themselves (e.g., hair, fingerprints). The other options - Enterprise Theory of Investigation, Locard's Evidence Principle, and Evidence Theory of Investigation - are either unrelated concepts or fabricated names.

Topics

#Locard's Exchange Principle#Forensic principles#Evidence collection#Crime scene investigation

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