What is the purpose of scene security at a crime scene?

• A. To elicit confessions.
• B. To assign blame for the crime.
• C. To protect property.
• D. To protect people and preserve evidence by preventing contamination.

Answer: (D)

Securing a crime scene is about keeping people safe and preserving evidence by preventing contamination. By establishing a clear perimeter, controlling who enters, logging everyone who comes and goes, and using proper protective equipment, investigators minimize the chances that items are accidentally moved, touched, or altered. This helps keep fingerprints, DNA, tool marks, and other trace evidence in their original state and preserves the chain of custody so the facts can be understood later. The focus at the scene isn’t on eliciting confessions or assigning blame; those outcomes come from the investigation and legal process, built on reliable, uncontaminated evidence. While protecting property can be a consideration, the primary purpose of scene security is safety and the integrity of the evidence.