Former classmate of firefighter ambush suspect details past extremist views

As the investigation into the deadly firefighter ambush in Idaho over the weekend continues, police are still trying to piece together why suspect Wess Roley allegedly instigated the attack, a source familiar told ABC News.

Law enforcement officials identified Roley as the suspected gunman after he was found dead on Canfield Mountain with a shotgun and his cell phone nearby.

The FBI is taking the lead in the technical processing of the phone and what it holds, officials said in an update Tuesday night. Officials hope to exploit the contents of the device to glean any potential insight into a possible motive.

Two firefighters were killed in the attack on Sunday — Frank Harwood, 42, a battalion chief with the Kootenai County Fire & Rescue Department and John Morrison, 52, battalion chief of the Coeur d’Alene Fire Department — and another firefighter, Dave Tysdal, of the Coeur d’Alene Fire Department, was injured while responding to the brush fire, which officials believe Roley purposely started before the ambush.

Read more: ABC News