Which instruction applies to suspected crime scenes before ruling them out?

• A. Do not interview witnesses.
• B. Do not photograph the scene.
• C. Do not bag evidence.
• D. Do not clean up a suspected crime scene, or an area where a disruption may have occurred.

Answer: (D)

Whenever there is a possibility that a crime occurred, treat the area as a potential crime scene and preserve it as found. Cleaning up or altering the scene can destroy or contaminate clues—footprints, fibers, residue, the original arrangement of objects—which are essential for investigators to reconstruct events and determine if a crime happened. By not cleaning up, you keep the environment intact for documentation, collection, and analysis, and you help establish a reliable chain of custody. Other actions like interviewing witnesses, photographing the scene, and properly bagging items are standard parts of evidence management and can be done without compromising the scene; they support the investigation. The important point is to maintain the scene as-is until investigators determine it is not a crime scene, at which point cleanup can occur.