What is the first step to secure and control the crime scene?

• A. Release all witnesses immediately
• B. Expand the scene perimeter to include neighboring buildings
• C. Collect all evidence before interviews
• D. Identify everyone present within the crime scene

Answer: (D)

Identifying everyone present at the scene is the foundation of securing and controlling it. Knowing who is there helps determine who had access, who might have touched or moved items, and who should be escorted away or kept for statements. This creates a clear picture of potential witnesses and people who need to be managed to prevent contamination of evidence. With that roster in hand, responders can establish a proper perimeter, control movement, and plan interviews and evidence collection in a way that preserves integrity. Actions like releasing witnesses, expanding the scene before securing access, or collecting evidence ahead of interviews can lead to contamination or loss of information, whereas knowing who is present first ensures all subsequent steps protect the scene and the investigation.