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.

Two firefighters were killed and a third wounded Sunday when they were shot as they responded to a wildfire on an Idaho mountain that was set to lure them into an ambush, authorities said.A tactical response team used cellphone data to zero in on a wooded area where they found the body of what's believed to be the lone suspect and a rifle nearby as flames were rapidly approaching,

The suspect, who died on Sunday and was found with a firearm nearby, was a 20-year-old man, according to a law-enforcement official.