What type of patterns are commonly examined in arson cases?

In arson cases, fire patterns and burn indicators are critical elements that investigators examine to determine the origin and cause of a fire. Fire patterns can provide significant clues about how the fire started and the materials involved in its combustion. Investigators analyze the intensity and direction of burn marks, the presence of shadows and peak burns on surfaces, and the temperature variations present to piece together the sequence of events leading to the fire.

Burn indicators, such as the presence of accelerants or the type of materials that burned, further aid in finding whether the fire was accidental or intentionally set. Forensic experts utilize these patterns to establish a timeline and ascertain whether any foul play was involved. This type of analysis is unique to fire investigations and distinguishes arson from other forensic examinations, such as those related to firearms or biological evidence found at crime scenes.