Authorities believe he killed himself.
Long's friends said he would often go to the Borderline Bar & Grill.
During the somber day of mourning Thursday, thousands of people attended a vigil for the victims after 28-year-old gunman Ian David Long opened fire at a college night event at the Borderline Bar and Grill before allegedly taking his own life. Following an exchange, the mental health professional told law enforcement authorities Long did not need to be taken into police custody. "The second time around doesn't get any easier". At least 12 people were injured in the attack.
The shooting in Thousand Okas, Calfornia, left 12 dead. It also came less than two weeks after a gunman massacred 11 people at a synagogue in Pittsburgh. Some say it's too early or too disrespectful to the families of the victims.
Witnesses described a scene of panic in the bar when the gunman started firing. "People come back and it's a disgusting thing, they come back and are never the same", he said.
"I dropped to the floor", Sarah Rose DeSon told ABC's "Good Morning America".
After the mass shooting at his school in Parkland, Florida, Hogg stated, after the New York Magazine author had ironically said he came "armed with facts", that, "There have been 18 more mass shootings than there need to be this year at schools".
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An emotional Dean described Helus as a friend and colleague. About four minutes after arriving on the scene and after hearing shots fired inside, he went through the front door and was hit multiple times, Dean said.
"He was an unbelievable man", sheriff's Capt. Garo Kuredjian said. University President Chris Kimball said that Meek "heroically saved lives" during the tragedy. "He went in to save lives, to save other people".
In response to the Thousand Oaks mass shooting on Wednesday, Marjory Stoneman Douglas High School mass shooting survivor and pro-gun control activist David Hogg was among the many who pushed an inflated number of mass shootings that have occurred this year.
House Democrats have pledged to use their new majority to pass gun control legislation, with a bill to expand background checks on gun purchases named as one of their top legislative priorities next year.
"(The deputy said), "Hey, I have to handle a call. I don't know what was going through his head when he wrote this. Some said they used chairs to break windows to escape while others sheltered inside toilets. A doorman at the bar and a police officer were among the dead. The motive for the shooting was not known. That exit leads to a patio where people smoke. "There's a fence right there so I said, 'Everyone get over the fence as quickly as you can, ' and I followed them over". He and a California Highway Patrol officer ran into the bar where Helus was shot.
"I screamed to him, 'There's a shooter in there!' He was kind of in disbelief, then saw that I was serious", Knapp said.