User:Kassigoslow/Fire investigation

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. These investigations can occur in two different stages. The first stage is examination of the fire scene to determine origin and cause. The second is laboratory analysis of recovered samples. Investigations of such incidents require a systematic approach and knowledge of fire science.

Conducting investigations
The main steps of a fire investigation include:


 * 1) Arrive at the scene
 * 2) Ensure safety of crime scene
 * 3) Secure the area
 * 4) Investigate the scene
 * 5) Evaluate external structure
 * 6) Evaluate interior structure
 * 7) Determine point of origin
 * 8) Document the evidence
 * 9) Sample and tag evidence
 * 10) Sketch the scene and damage
 * 11) Photograph evidence
 * 12) Conclude the investigation
 * 13) Finish necessary documents/reports
 * 14) Interview necessary parties
 * 15) Present evidence

Fire investigators conduct their investigations using a systematic approach utilizing the scientific method, including the following:When arsonists attack, there is very rarely much evidence left at the scene. However, arsonists usually use accelerants to speed up a blaze. Forensic scientists use technologies to heat samples taken from the scene causing any residue to separate. This sample is then analyzed to determine the chemical structure. Scientists also use other tests such as using liquid nitrogen gas to trap residue which are then analyzed using gas chromatography. The investigator:


 * Receives the assignment and responsibilities
 * Plans the investigation and assembles tools, equipment, and personnel
 * Examines the scene and collects data
 * Collects, tests, evaluates, and documents evidence
 * Applies the scientific method to analyze the information obtained

Depending on how much evidence is present, an investigator can use different approaches. Two techniques include process of elimination, or disregarding the causes that the evidence deems not possible. The second is to start investigating the most probable cause first until it is ruled unlikely.

Fire scene reconstruction is critical to understanding complicated fires. When normal approaches fail, laboratory reconstructions become critical. They contribute to the resolution of critical issues and the enhancement of fire safety. A reconstruction's objective, whether it is a test, experiment, or demonstration, must be clearly stated. Various tests, ranging from small-scale to full-scale, help to understand fire behaviour. Clear agreements on size, safety, and data are required before proceeding. Specialist laboratories play an important role in increasing fire safety knowledge.