KANEOHE, Hawaii - A gunman who opened fire at the Borderline Bar & Grill in Thousand Oaks, California, late Wednesday night is identified as 28-year-old former Marine Ian David Long. Police say he then turned the gun on himself.

Twelve people were killed, including a Ventura County sheriff's deputy, and at least a dozen people were injured. The Marine Corps confirms 28-year-old Long served a tour of duty in Hawaii, at Kaneohe Marine Corps Base, assigned to the 2nd Battalion, 3rd Marine Regiment, Third Marine Division in Kaneohe Bay.

The Marine Corps says Long was in the Marines from August 4, 2008 to March 2, 2013, serving as a machine gunner and earning the rank of corporal in August 2011. He deployed to Afghanistan for seven months, from November 16, 2010 to June 14, 2011.

The Marine Corps says Long earned several awards: two Navy Unit Commendations; a Navy Meritorious Unit Commendation, Combat Action Ribbon; a Marine Corps Good Conduct Medal; two Sea Service Deployment Ribbons, an Afghanistan Campaign Medal; a Global War on Terrorism Service Medal; a National Defense Service Medal; and a NATO Medal-ISAF.

The Marine Corps says Long entered active duty in Los Angeles, and Kaneohe was his last duty assignment. 

The Marine Corps says it "extends its deepest condolences to the families of the victims in this senseless tragedy."

We reached out to the VA Pacific Islands Health Care System to see if Long had ever sought treatment there. It says no, and that "Our thoughts and prayers are with the victims and their families."

A retired military member who lives not far from the base tells KITV4 it's sad but not surprising. Gary Green, Air Force veteran and Kailua resident, says "I was saddened by the fact that this occurred, mostly because it involved a former member of the Marine Corps who was obviously stationed out here at one time."

Green says PTSD is one of the costs of combat. "I think it's a reflection of our times. The 17 to 18 year old war we've had in Afghanistan, people going over there, he comes back with PTSD, probably not being treated well enough by the VA, and that's what happens."

We reached out to the VA Pacific Islands Health Care System to see if Long had ever sought treatment there. It says no, and that "Our thoughts and prayers are with the victims and their families."

Green says he hopes the fallout from the killings will be on mental health, but suspects it will be on something else. "It's going to be a gun control issue again. But essentially, unless congress decides to act on this situation, nothing will be done. It could have been anybody. It's going to be highlighted, the fact he was in the military."

There are 10,000 active duty Marines in Kaneohe. Many live, shop, eat and play there and in Kailua. Businesses we talked to say they don't feel a need to step up security measures.

Julianna Chaize, co-owner of Nico's Kailua says, "We have a lot of military. I am happy about that. Those guys are there to protect us."

Roxanne Murphy works at Lanikai Brewing Company and agrees, "I feel pretty safe here. Kailua town is safe. For the most part, I feel good about working here."

Though, there is a concern over the growing violence in the country. 

Nicholas Bailey works in Kaneohe, says, "There's just been so many mass shootings all around the country, it's ridiculous already. Something has to be done."

One more fact about Long. Hawaii court records show he and his wife Stauroula Long  filed for divorce while living in Hawaii.