The gunman, identified by police as 28-year-old Ian David Long, was found dead of an apparently self-inflicted gunshot wound following the Wednesday night massacre at the Borderline Bar and Grill in Thousand Oaks, a suburb 40 miles (64 km) northwest of Los Angeles, law enforcement officials said.
A gunman killed 12 people, including a police officer, when he opened fire in a country music bar packed with college students in California, officials and witnesses said Thursday.
Daniel Manrique was a native of Thousand Oaks and had served in Afghanistan with the Marine Corps, Task and objective reported.
He first fired on a person working the door, then appeared to shoot at random at people inside, they said.
Hundreds of people lined the streets of Thousand Oaks, Calif. on Thursday to honor fallen Ventura County Sheriff's Sergeant Ron Helus, who was killed while responding to a mass shooting at a bar overnight. But Dean said the gun had an extended magazine that is illegal in California. "There's a fence right there so I said, 'Everyone get over the fence as quickly as you can.' And I followed them over".
Long joined the Marines in 2008 and rose to the rank of corporal before leaving active service in 2013, Joseph Butterfield, a Marine spokesman, wrote in an email. Can you do that for me?
The sheriff said a mental health crisis team was called at that time and concluded that Long did not need to be taken into custody.
"I heard shots", he told CBS in an interview, "and that's not a noise you mistake for anything else".
By the time they entered the bar again the gunfire had stopped, and they found 12 people dead inside, including Helus and the gunman.
Sgt Helus died early yesterday at a hospital. "As you know, these are ongoing investigations and that information will come out as soon as we are able to determine exactly who the suspect was and what motive he might have had for this horrific event".More news: Richard Blumenthal: Trump firing Sessions is a 'break the glass moment'
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An American flag hung on the garage at Long's home on Thursday as law enforcement gathered outside.
In social media posts, Molly Mauer said she was at Borderline and also survived Vegas.
Police said they had previous contact with the gunman.
Asked what made him decide to go back and help others, he added: 'Instinct, that's all that I could do.
The Borderline Bar is popular with students of California Lutheran University, Pepperdine University and other area schools.
He bolted toward an exit onto a smoking patio, filled with more people who hadn't heard the gunshots over the loud music "and I told them get over that fence and just run". The only thing I that could have wished for is to have something better than a bar stool, ' he said. "He looked like he knew what he was doing".
Jasmin Alexander, who was with around 15 friends at the bar, said there was chaos and confusion inside when shots rang out.
Helus was a 29-year veteran looking forward to retirement in the next year or two, and leaves behind an adult son in addition to his wife, grieving colleagues said. He said he thought their injuries were minor, and that majority were likely injured as they escaped, some by breaking windows.
The body of the slain sheriff's officer was taken by motorcade from the hospital to the coroner's office yesterday.