The man accused of fatally shooting two Idaho firefighters before killing himself had previously tried to join the fire department and became frustrated and angry when he was told that he would need to go through training and testing.

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, Idaho.