Authorities state the shooter, identified as 28-year-old military veteran Ian David Long, approached the premises around 11:20pm.
Another photo from 2014 shows Ian Long with his arm draped around his mother in front of Dodger Stadium.
According to survivors, Long was dressed in all-black, wearing a baseball cap, sunglasses and a mask covering the bottom part of his face.
"I know that, being a religious person, that God is never going to give me anything more than I can handle", he said. But a mental health specialist who assessed Long after sheriff's deputies responded to a call about his agitated behavior last spring anxious he might be suffering from PTSD (Post-traumatic stress disorder). He and other first responders "ran toward danger", Sheriff Geoff Dean said at a vigil Thursday evening, calling Helus a hero.
Authorities are also investigating whether he believed his former girlfriend would be at the Borderline Bar and Grill, said the official, who was briefed on the investigation but not authorized to discuss it publicly and spoke to The Associated Press on condition of anonymity. "He didn't come home last night", said Schmidt-Orfanos, whose son Telemachus was a 27-year US Navy veteran. I don't want to hear about thoughts and prayers. On his way to the bar, Helus was talking on the phone with his wife, his last words to her as obtained by the Los Angeles Times were "Hon, I got to go, I love you".
Orfanos, who served in the Navy, attended the Route 91 Harvest music festival in Las Vegas previous year, where a gunman opened fire from the Mandalay Bay hotel in the worst mass shooting in US history.
President Donald Trump tweeted that he had "been fully briefed on the awful shooting", the latest chapter in America's epidemic of gun violence that came just 10 days after a gunman killed 11 worshippers at a synagogue in Pittsburgh.
"They felt he might be suffering from PTSD, the fact he was a veteran and had been in the Corps", Dean said. Tim McGraw and Faith Hill called for stricter gun control.More news: Ali stars with the ball as England beat Sri Lanka
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"Maybe there was a motive for this particular night, but we have no information leading to that at all", the sheriff said.
"I don't know how, I don't know how", he said, before breaking into tears as he held onto his father-in-law.
People run from the Route 91 Harvest country music festival after gun fire was heard, October 1, 2017 in Las Vegas. Gunshots were heard even as officers were responding to the incident.
Hundreds of people were inside the bar when the shooting occurred.
"All of a sudden we heard the "bang, bang" of the gunshots and it just started going insane and people were pushing. If he talks, just acknowledge him, don't go into conversation with him,"' Don MacLeod said.
The city of about 130,000 people, about 40 miles from Los Angeles, is annually listed as one of the safest cities in America.
In this image made from aerial video, police vehicles line a road in the vicinity of a shooting in Thousand Oaks, California, early Thursday, Nov. 8, 2018.
"Tonight Thousand Oaks takes its place with those cities, who in order to move forward will rely on hope. we are Thousand Oaks strong". Fifty to 60 families gathered at the Thousand Oaks Teen Center in search of missing loved ones.
It was the nation's deadliest such attack since 17 students and teachers were killed at a Parkland, Florida, high school nine months ago.