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.

In the wake of the deadly ambush on responding firefighters in Coeur d'Alene, Idaho, the suspect's grandfather spoke to ABC News on Monday.

The identities of the two Idaho firefighters killed by a sniper in a horror ambush have been released. Kootenai County Fire and Rescue Chief Frank Harwood, 42, and Coeur d’Alene Fire Department Battalion Chief John Morrison,