Which is correct regarding evidence preservation?

• A. Post a guard to limit access
• B. Remove evidence to a safe location
• C. Law enforcement isolate fire line tape
• D. Wait for the arrest to be made

Answer: (A)

Preserving evidence hinges on controlling access to the scene. Posting a guard to limit who can enter directly supports the integrity of the investigation by creating a physical barrier and a clear log of who is allowed to approach or touch items. This helps prevent contamination, tampering, or unintentional disturbance, and it strengthens the chain of custody by documenting every interaction with evidence. Removing evidence to a safe location, while sometimes necessary, risks losing or altering probative value unless it is done under strict, documented procedures. While law enforcement might use tape or cordons, a guard provides active, ongoing control and monitoring of the area, which is the most reliable way to ensure the scene remains as intact as possible for investigators. Waiting for an arrest does nothing to protect or preserve evidence in the moment.