A gunman opened fire at a crowded bar in Southern California Wednesday night, killing 12 people and wounding many others. The Borderline Bar and Grill in Thousand Oaks is popular among local college students. It was holding its weekly country music and dance night at the time of the shooting. Police have identified the suspected killer as 28-year-old Ian David Long, a former Marine. He was found dead in the office of the Borderline, after reportedly having shot himself. Ventura County Sheriff Geoff Dean told reporters Thursday that Long had served in Afghanistan. Dean said Long reportedly used a handgun in the attack. The gun had a special device that permitted it to hold more bullets than usual. The device is illegal in California. There was no known motive for the shooting, Dean said. He added, “Obviously he had something going on in his head that would cause him to do something like this.”