On arrival at the scene, investigators should first:

• A. Leave the area and return later.
• B. Ask how the room was secured and exchange notes with who secured it.
• C. Immediately photograph the entire scene.
• D. Question every bystander.

Answer: (B)

The essential action when investigators arrive is to verify how the room was secured and who secured it, and to exchange notes with that person or team. This establishes immediate control of the scene and creates a documented record of access and handling so the integrity of evidence isn’t compromised. Knowing who secured the area and what they did helps maintain a clear chain of custody for any items later collected and ensures you start from an accurate, shared baseline for all subsequent steps, such as documenting, photographing, and interviewing. Leaving the area riskily allows contamination or loss of context; photographing the scene is important but should follow confirmation of security and notes exchange; and questioning bystanders is not prioritized until the scene is stabilized and essential facts are established.