NFPA 921 sets the bar for scientific-based investigation and analysis of fire and explosion incidents. Referenced in the field, in training, and in court, it is the foremost guide for rendering accurate opinions as to incident origin, cause, responsibility, and prevention. It is intended for use by both public sector employees who are responsible for fire investigation and private sector professionals who conduct investigations for insurance companies or litigation purposes.

NFPA 921, Guide for Fire and Explosion Investigations, provides the roadmap for scientific investigation methods used to formulate fact-based opinions on incident origin, cause, responsibility, prevention, and the damage and injuries that can arise in such cases.

Reference NFPA 921 for guidance in:

• Using the scientific method in origin and cause investigations
• Documenting an investigation so that all relevant facts are gathered for future use in court
• Handling fire-related evidence so that it's admissible in court
• Understanding many of the terms related to explosion and fire investigations