What is the best starting point for a fire investigation when moving inside a building?

• A. Area with most damage
• B. Area with least damage
• C. Area farthest from the entrance
• D. Area with the most heat

Answer: (B)

Begin in the area with the least damage because that zone is most likely to preserve original fire patterns and any clues about the ignition source before they’re altered by the flames, smoke, and suppression efforts. From there, you move toward areas showing more damage to trace the fire’s progression and identify where it started. Heavily damaged or high-heat zones can obscure or destroy the evidence investigators rely on, and moving straight into the most damaged areas can be unsafe. Starting with the least-damaged area helps protect evidence and safety while providing a clearer path to determine the origin and sequence of events.