Firefighters were ambushed by a gunman while responding to a brush fire in Coeur d'Alene, Idaho, on Sunday, according to the local sheriff's office.

The suspect was found dead with a firearm nearby late Sunday, authorities said.

A 20-year-old man's life appeared to have begun to unravel in the months before law enforcement say he fatally shot two firefighters and severely wounded a third as they responded to a wildfire near Coeur d'Alene,