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During the scene examination, investigators may find evidence such as accelerants, tampered utilities, and specific burn patterns, which may indicate criminal activity.

There are basically three types of evidence, all of which in some manner relate to fire investigations. They are demonstrative evidence, documentary evidence, and testimonial evidence.

The Scientific Method for Fire and Explosion Investigation The basics of the scientific method are deceptively simple: observe, hypothesize, test, and conclude.

An arson investigator will try to determine who is responsible for setting a fire; a fire investigator will attempt to determine the cause and origin of a fire.

There are three types of evidence: demonstrative, documentary, and testimonial. Fire scene reconstruction involves re- creating the scene before the fire occurred.

Fire and arson investigators examine the physical attributes of a fire scene and identify and collect physical evidence from the scene. This evidence is then analyzed to help determine if the cause of the fire was accidental or deliberate.

Most items of evidence will be collected in paper containers such as packets, envelopes, and bags. Liquid items can be transported in non-breakable, leakproof containers. Arson evidence is usually collected in air-tight, clean metal cans.

The Scientific Method for Fire and Explosion Investigation The basics of the scientific method are deceptively simple: observe, hypothesize, test, and conclude.