What is crucial to note in forensic photography related to arson?

In forensic photography related to arson, it is essential to note the time of day the fire started because this information can provide critical insights into the fire's origin and development. The timing affects the visibility conditions, which can influence how the fire behaves and the extent of damage caused. Additionally, knowing when the fire started can help establish a timeline of events that may be relevant in determining intent or negligence. This information can also aid in correlating witness statements and other evidence, allowing investigators to piece together a more comprehensive picture of the incident.

Other factors such as the type of fuel used, the presence of firefighters, and the location of fire hydrants could be significant in various aspects of investigating an arson case, but the timing directly relates to understanding the dynamics of how the fire spread and the factors affecting its growth at the time it ignited.