According to fire investigation standards, is "suspicious" an appropriate classification for a fire?

In fire investigation, the terminology used to classify a fire is crucial as it affects the approach taken during the investigation. The classification of "suspicious" is often viewed as inappropriate because it lacks a specific, objective basis for analysis. Fire investigations rely on established criteria that focus on the physical evidence present and the circumstances surrounding the incident. Instead of using subjective terms like "suspicious," investigators are encouraged to utilize classifications that are more definitive, such as "accidental," "incendiary," or "undetermined."

Using the term "suspicious" can lead to ambiguity and may influence the investigation's direction based on assumptions rather than empirical evidence. A suspicious fire implies a sense of intention or deliberate action, which should be substantiated by clear evidence rather than speculation. Proper standards maintain that fire classifications should be based on evidence that can be clearly articulated and defended, ensuring investigations remain objective and thorough. This is why referring to a fire as "suspicious" is generally not considered appropriate within the standards of fire investigation.