An occupant stating that the room smelled like propane immediately before the fire started is an example of what type of evidence?

The scenario in which an occupant reports a propane smell just before the fire began is an example of direct evidence. This type of evidence directly connects a person or event to the facts of the case. In this instance, the occupant's statement provides first-hand information and direct observation regarding a potential cause of the fire, which is the presence of propane. It establishes a clear link between the smell and the events leading up to the fire.

Direct evidence is valuable in investigations because it can serve to affirm specific details without needing further inference or deduction. In contrast, circumstantial evidence relies on inference and may suggest a conclusion but does not directly prove the connection. Physical evidence involves tangible items that are collected during an investigation, and documentary evidence refers to written or recorded material. Thus, the occupant’s account of smelling propane is a straightforward instance of direct evidence, making it crucial for understanding the circumstances surrounding the fire.