As to the Intentional classification I think your question is answered in the definition of Incendiary. If you use the definition that remains in 921, it is a fire that is intentionally ignited in an area or under a circumstance where and when there should not be a fire. NIFRS definition would be found under Arson. What they are saying is you can have an intentionally set fire and that designation could include the deliberate misuse of heat source or a fire of an incendiary nature. That does not mean it is a criminal act. The criminal act definition is, “To unlawfully and intentionally damage, or attempt to damage, any real or personal property by fire or incendiary device.” This is the point, there must be a separation in defining the intent from the cause which 921 does not do. NIFRS is saying there can be an intentional fire that is not necessarily a criminal act.

Jim Mazerat
Forensic Investigations Group