The man who police believe killed two Idaho firefighters responding to a brush fire after starting the flames himself had wanted to pursue a career in the fire service, his grandfather told CNN.

Authorities identified the suspect as Wess Roley. Kootenai County Sheriff Bob Norris said it appeared he had been living in his car, and authorities did not know why he was in the area. Roley, who dreamed of becoming a firefighter himself, was found dead on the mountain from a suspected self-inflicted gunshot wound.