Which statement reflects why a crime scene perimeter is established?

• A. To keep the room lit adequately
• B. To control access to primary focal point and evidentiary value areas
• C. To maximize foot traffic
• D. To minimize noise

Answer: (B)

Controlling access to the area of interest is the central purpose of establishing a crime scene perimeter. By setting boundaries, investigators limit who can enter and what activities can occur near key evidence, which helps prevent contamination, disturbance, or loss. This preserves the integrity of the evidence, supports an unbroken chain of custody, and enables accurate documentation of the scene around its primary focal point. While lighting, movement, or noise are considerations for how the scene is managed, they do not explain why a perimeter is drawn.