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.

The man said the Idaho shooter stayed at his apartment for about six months and left in January after he made "gang signs" at his interior security camera.

Wess Roley, who authorities say took his own life after Sunday’s shootings, is suspected of killing two battalion chiefs whose firefighting careers in Idaho spanned nearly half a century combined.

A sheriff says a man shot firefighters battling a blaze in northern Idaho after they asked him to move his vehicle, killing ...