Which action best supports maintaining integrity of the fire scene?

• A. Protect the scene from excessive overhaul
• B. Helmet cam during attack
• C. Post a law enforcement officer at exterior doors
• D. Post line tape after controlling fire

Answer: (A)

Preserving evidence and the original condition of the scene is essential to a proper fire investigation. Overhaul activities—digging through debris, moving furniture, cutting into walls, and aggressive debris removal—can smear fire patterns, contaminate fuels or accelerants, and destroy the clues investigators rely on to determine origin and cause. By protecting the scene from excessive overhaul, responders minimize disturbance, keeping the evidence as close to its original state as possible and reducing the risk of misinterpretation later.

Other steps like recording with a helmet cam, securing exterior doors with law enforcement, or posting line tape are helpful in their own ways, but they don’t directly prevent interior disturbance during the critical investigation phase. The key is to limit disturbance to preserve the scene for investigators.