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.

Wess Roley was living out of his vehicle and his former roommate, T.J. Franks Jr., said he shaved off his long hair and started to "kind of go downhill.” The two lived together for about six months in Sandpoint, Idaho, until Roley moved out in January, Franks said Monday.