NFPA 921

NFPA 921 is a set of guidelines for investigating fires and explosions. The purpose of these guidelines is to help people figure out how and why a fire or explosion happened, and what can be done to prevent similar events from happening in the future. These guidelines provide information to fire investigators about the steps to take when investigating a fire or explosion, what kind of evidence to look for, and how to interpret and analyze this evidence to develop an understanding of how the incident occurred.