Wess Roley once lived in Phoenix, with some of his family still living in the area, according to court records and social media posts.

Investigators say Roley intentionally set the fire to ambush the fire crew on Sunday and was perched in a sniper position, firing at the firefighters, according to the AP. They took cover behind firetrucks, but two died and a third was wounded during a barrage of gunfire over several hours, authorities said.