What action can only an arson investigator perform at a fire scene?

An arson investigator is specifically trained to conduct interrogations of individuals suspected of committing arson. This action requires a specialized understanding of the legalities involved, as well as advanced interviewing techniques tailored to extract information in a way that is both ethical and lawful. Such expertise is often not within the normal purview of general fire department personnel, whose roles might include documenting the scene or collecting evidence.

In addition, interrogations require an understanding of criminal procedure and can significantly impact the legal process. While other personnel might document the fire scene or collect evidence, the detailed and technical process of confronting a suspect about potentially criminal actions is distinctive to the role of an investigator trained in arson cases. This allows for a comprehensive investigation into the cause of the fire and any potential malicious intent behind it, which is crucial for both prosecution and prevention of future incidents.