Which action best preserves integrity at a crime scene?

• A. Secure the area, limit access, document conditions, and prevent contamination or alteration
• B. Move evidence to the lab immediately
• C. Notify the press
• D. Interview witnesses first

Answer: (A)

Preserving integrity at a crime scene means keeping the scene as undisturbed as possible so evidence remains reliable for investigation and court. The best action is to secure the area, limit access, document conditions, and prevent contamination or alteration. This creates a controlled environment, preserves the original state of evidence, and allows accurate photos, sketches, and measurements while maintaining a clear chain of custody. Moving evidence to the lab before securing the scene can destroy context and introduce contamination, making it harder to interpret where items were found or how they related to one another. Notifying the press tends to spread details beyond the scene and can contaminate or bias the investigation. Interviewing witnesses before securing the area can also disturb the scene or bring in outside elements that alter its condition. By securing, documenting, and limiting access, investigators protect both the physical evidence and its contextual value, which is critical for a credible, admissible case.