Ex-Marine was known to authorities
Before authorities said he opened fire at a Thousand Oaks bar, killing 12 people Wednesday night, Ian David Long was known among his neighbors in Newbury Park as a troubled ex-Marine who appeared to have serious mental health problems.
Long, 28, made the 5mile drive from his home to the Borderline Bar and Grill, where he tossed smoke bombs and rained bullets on a crowd of 150 to 200 people, law enforcement officials said.
Authorities said Long carried out the attack armed with a Glock 21 .45-caliber handgun, which he purchased legally in Simi Valley, but had apparently modified with an extended magazine.
Ventura County Sheriff Geoff Dean said Long was found dead of an apparent gunshot wound in an office inside the bar. Authorities suspect he killed himself after carrying out the attack. Dean said officials discussed whether the gunman suffered from post-traumatic stress disorder.
Dean said his department had had several interactions with Long, including a visit to his home in April for a complaint of disturbing the peace. Deputies at the time said Long was irate and acting irrationally, Dean said. They called in mental health professionals to evaluate him, and they concluded he did not need to be taken into custody.
According to the U.S. Marines, Long served between 2008 and 2013 and was a machine gunner. He was stationed in Afghanistan from 2010 to 2011.
He received standard military honors including the Navy Unit Commendation, the Navy Meritorious Unit Commendation, Combat Action Ribbon and Marine Corps Good Conduct Medal. In 2011, he attained the rank of corporal. His last post was at Kaneohe Bay in Hawaii.