In the absence of an investigator, the preservation of physical evidence rests with which person?

• A. Police officer
• B. Fire officer
• C. Building owner
• D. Fire chief

Answer: (B)

Preserving evidence at a scene is about keeping the area intact and uncontaminated until an investigator can take over. The on‑scene fire officer, acting as the incident commander, is responsible for this. They establish a clear perimeter, limit access, and prevent unnecessary movement or removal of items that could be evidence. They also document conditions and control who touches anything, creating a dependable chain of custody for when investigators arrive. This duty falls to the fire officer because they’re the on-site leader with authority to protect the scene and coordinate with investigators. Building owners typically don’t have the authority or responsibility to preserve evidence in a way investigators rely on, and while chiefs or police handle investigations, the immediate responsibility to safeguard evidence in the absence of an investigator rests with the on‑scene fire officer.