Which of the following is a typical indicator of arson?

The presence of multiple points of origin is a significant indicator of arson because it suggests that the fire was deliberately set in several locations rather than arising from a single, accidental cause. In cases of arson, the intent is often to create chaos and maximize destruction, which is more likely if a fire is ignited in multiple areas simultaneously. Firefighters and investigators look for these patterns, as they help in distinguishing between natural or accidental fires and intentionally set ones.

In contrast, the presence of smoke detectors, the use of standard fire extinguishers, or poor structural integrity do not provide conclusive evidence of arson. Smoke detectors are standard safety devices meant to protect property and lives from any fire, regardless of the cause. Similarly, standard fire extinguishers are common tools for controlling fires at their inception, and their availability does not imply malicious intent. Poor structural integrity may contribute to how a fire spreads or is contained but does not indicate whether the fire was intentionally set. Therefore, multiple points of origin stand out as a clear and critical sign needing further investigation in fire cases.