Authorities identify California bar shooter as 28-year-old former Marine Ian David Long - NY Daily News

Authorities identify California bar shooter as 28-year-old former Marine Ian David Long - NY Daily News

Authorities have identified the shooter accused of gunning down 12 people at popular California college bar as former Marine Ian David Long.

Officers found the 28-year-old suspect dead inside Borderline Bar & Grill late Wednesday night after the bloody attack. Ventura County Sheriff Geoff Dean said the gunman used a legally purchased .45 caliber Glock — modified with an extended magazine — to carry out the mass shooting.

“We don’t know how many rounds were in the weapon,” Dean said during a press conference late Thursday morning. “Witnesses are still being interviewed.

The Ventura County Sheriff’s Department has had several interactions with Long in the past, including an April call to his Newbury Park home, where authorities found him acting irate and irrational. A crisis mental team also responded, but concluded that he did not need to be taken into custody.

According to Department of Defense records, Long was on active duty with the US Marine Corps from August 2008 to March 2013. He reportedly shared information about his military service on a special forces forum called Shadowspear.

In a March 2017 post uncovered by CNN, Long said he served in Afghanistan as an infantry machine gunner and was an instructor in Okinawa.

“I was honorably discharged in 2013. I am graduating with a B.S. in Athletic training in two months,” he wrote. “Maybe the ego got the better of me but it took only one time for a 19 year old D-2 athlete to talk down to me and tell me how to do my job that I realized this wasn’t the career I wanted to head.”

Dean said it’s possible the suspected gunman had been suffering from post-traumatic stress disorder.