Evidence includes material objects as well as documentary or oral statements that are admissible as testimony in a court of law. Evidence proves or disproves a fact or issue. The fire officer must consider three types of evidence. The three types of evidence are as follows. Demonstrative evidence; Tangible items that can be identified by witnesses, such as incendiary devices and fire scene debris. The second type of evidence is Documentary evidence; Evidence in written form such as reports, records, photographs, sketches, and witness statements. The third type of evidence is Testimonial evidence; Witnesses speaking under oath. If the fire officer has determined that the fire requires a formal investigation, then every effort should be made to protect and preserve the fire scene evidence.

I agree. Evidence in fire investigations is critical for establishing facts and supporting legal proceedings. Demonstrative (physical) evidence, such as incendiary devices or debris, provides tangible proof. Documentary evidence, including reports, photos, and sketches, helps reconstruct the incident and supports findings. Testimonial evidence from witnesses under oath offers firsthand accounts of events. A fire officer must carefully protect and preserve all evidence when a formal investigation is required, ensuring its integrity for both legal and investigative purposes.