A man who started a wildfire and then fatally shot two firefighters and wounded another in northern Idaho was a 20-year-old transient who attacked the first responders after they asked him to move his vehicle,

Wess Roley, 20, was found dead with a gun nearly six hours after the attack, and investigators say he acted alone, according to the Associated Press.

This was a total ambush,” Kootenai County Sheriff Bob Norris said during a Sunday night news conference in Hayden. “These firefighters did not have a chance.”