Authorities are trying to determine why a sniper ignited a blaze then ambushed and fatally shot and killed two responding firefighters.

Two firefighters were killed in Idaho after a suspected gunman started a fire and then ambushed the responders, according to authorities. The suspect was found dead after the shooting. Former Senior Executive in the FBI Counterterrorism Division Christopher O’Leary joins Erielle Reshef to provide more insight on the investigation.

Firefighters were ambushed by sniper fire while responding to a blaze in a northern Idaho mountain community Sunday, killing at least two people and unleashing barrages of gunfire over several