The suspect who police believe gunned down two firefighters Sunday after starting a brush fire in Idaho wanted to pursue a career as a firefighter himself, 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.