Read more Ron Helus, a Ventura county sheriffs sergeant, was among those killed at the Borderline Bar and Grill, about 40 miles west of Los Angeles. Long was found dead at the scene, having apparently shot himself.
Ventura county sheriff Geoff Dean said sheriffs deputies were called to Longs home in Newbury Park, five miles west of Thousand Oaks, in April 2018. They found Long somewhat irate, acting a little irrationally, Dean said. The deputies called in mental health specialists. The specialists decided Longs mental state did not require him to be detained for further assessment.
Dean said Long was a veteran of the US Marine Corps. The 28-year-old was on active duty with the marines from August 2008 to March 2013, CNN reported, citing the Department of Defense. The marine corps told news organizations that Long served in Afghanistan between November 2010 and June 2011. He was a machine gunner.
Video: Mass shooting at a bar in Thousand Oaks, California
Authorities said the .45 caliber Glock handgun used in the shooting was legally purchased. But Dean said Long had used an extended magazine – illegal in California – during the shooting, which would enable the weapon to fire more rounds before needing to be reloaded.
In April, officers responded to a disturbance at Long's home, and he was somewhat irate and acting irrationally, Dean said. A mental health specialist met with him and ultimately decided not to detain him under laws pertaining to his mental health.
Dean said officials had been unable to find a connection between Long and the Borderline bar. We have no idea what the motive was at this point, Dean said. Neighbors told local news channel ABC6 that Long lived with his mother, who had expressed concern over her sons behavior.
Video: Gunman dead after at least 11 injured in shooting at bar in Thousand Oaks, California
Long was the victim of a battery at a bar in Thousand Oaks in January 2015, Dean said. Long had received two minor traffic citations in recent years, Dean said. One came after he was involved in a traffic collision.
Long had attended California State University, Northridge. We have learned that the reported shooter is a former CSUN student, who last attended in 2016, said Dianne Harrison, the universitys president. Harrison did not give any more details.
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