What should an investigator consider when evaluating the investigation site?

An investigator should consider the complete context of the scene and its surroundings because this comprehensive approach allows for a more thorough understanding of the factors that may have contributed to the fire or explosion. Analyzing the entire scene helps identify possible ignition sources, fuel sources, and any fire protection systems that were in place. It also enables the investigator to consider the layout of the area, the presence of nearby buildings or hazards, and witness accounts, all of which can provide critical insights into the fire's origin and development.

Additionally, by taking into account the broader context, investigators can make connections between different elements that might not be immediately obvious, leading to a more accurate reconstruction of the events leading up to and following the incident. Such an approach aligns with the principles outlined in NFPA 921, which emphasizes the importance of a systematic and holistic assessment during fire investigations.