New details are emerging about the 20-year-old suspect that police say started a brush fire and then began shooting at firefighters responding to it in an ambush-style attack. Police say he has no criminal record and likely used a shotgun before dying from a self-inflicted wound six hours after the shooting began.

The 20-year-old man’s life appeared to have begun to unravel in the months before authorities say he fatally shot two firefighters and severely wounded a third.