What should a first responding officer do at a crime scene?

• A. Ensure safety, render aid if needed, preserve life, secure the scene, document initial observations, and call for additional units/evidence collectors.
• B. Immediately interview all witnesses before securing the scene.
• C. Start collecting evidence without documentation.
• D. Ensure safety, render aid if needed, preserve life, secure the scene, document initial observations, and call for additional units/evidence collectors.

Answer: (D)

The main idea is to follow the proper sequence of actions for a first responder: prioritize life safety and protecting the scene so that evidence remains intact for investigators. A first responding officer must ensure safety and render aid as needed, seek to preserve life, secure the scene to prevent contamination or loss of evidence, and promptly document initial observations about the scene. After establishing these foundations, call for additional units and evidence collectors to support the investigation. This order helps maintain the integrity of the scene and the admissibility of evidence, which can be compromised if life-saving actions are delayed, the area is unsecured, or documentation is skipped. Interviewing witnesses before securing the scene can contaminate evidence and disrupt safety, and collecting evidence without proper documentation undermines the chain of custody.