Arson investigations may be particularly challenging because the evidence is likely to have been destroyed in the fire or contaminated during fire fighting operations. One such tool for the detection of accelerants at fire scenes recommended by investigators is the photoionisation detector (PID).
Fire investigation, sometimes referred to as origin and cause investigation, is the analysis of fire-related incidents. After firefighters extinguish a fire, an investigation is launched to determine the origin and cause of the fire or explosion. Investigations of such incidents require a systematic approach and knowledge of basic fire science.