Which action best supports evidence preservation at a crime scene?

• A. Move items to a different location before photographing.
• B. Preserve the scene and document evidence thoroughly.
• C. Touch potential evidence.
• D. Disregard chain-of-custody procedures.

Answer: (B)

Preserving the integrity of a crime scene by keeping it undisturbed and documenting every piece of evidence is essential. When the scene is preserved, you minimize changes and contamination that could alter what actually happened. Thorough documentation—photos, notes, sketches, and measurements—creates a reliable record of the scene and supports later analysis and courtroom use. Handling or moving items should be avoided initially, and any necessary movements must be done with proper procedures and documented, but the primary goal is to keep the scene intact and recorded first.

Moving items before photographing can erase or distort the original condition and context, making it hard to establish what occurred. Touching potential evidence can leave trace residues or transfer contaminants, compromising what you’re trying to prove. Disregarding chain-of-custody procedures undermines admissibility in court, since you must show who handled each item and when.