An autopsy determined that the gunman who killed 12 people at a Southern California bar died from a self-inflicted gunshot, police said Saturday.
According to Stripes, Ian David Long, a 28-year-old ex-Marine machine-gunner, fatally shot 11 people at the Borderline Bar and Grill in Thousand Oaks and a police officer who responded just before midnight Wednesday. The officer exchanged gunfire with Long, who was found dead at the scene.
Ventura County Sheriff Bill Ayub said an autopsy determined Long fatally shot himself.
Authorities have yet to determine a motive and are exploring all possibilities. Among them is whether Long believed a former girlfriend might have been at the bar, which was filled with about 150 people on its popular college night that attracts students from several nearby schools.
Sheriff's Capt. Garo Kuredjian said investigators were still interviewing witnesses, have served a search warrant at Long's home and searched the car Long drove to the bar.
"We're going to exhaust every investigative means possible," Kuredjian told the Ventura County Star.