Among the victims was Sgt. Ron Helus, a 29-year veteran of the Ventura County Sheriff's Office, who ran into the building after hearing gunshots. The highway patrolman pulled Helus out, then waited as a SWAT team and scores more officers arrived.
Sheriff Geoff Dean, who is set to retire on Friday, said Long may have suffered from post-traumatic stress disorder and was known to law enforcement officials due to several unspecified "contacts" stretching back multiple years.
A "dedicated" police officer who was one year from retirement died in the California bar massacre while trying to stop the gunman, it emerged today.
"He died a hero", Dean said. He gave his all.
Mr Coaly said that his friend is in good condition and with his dad.
He was one of the first officers through the door of the bar, according to CNN, but died at the hands of the gunman who killed 11 others.
Carl Edgar, a 24 resident of Tarzana, Los Angeles, told the Los Angeles Times around 20 of his friends were at the Borderline Bar and Grill in Thousand Oaks when a gunman opened fire, killing at least 12 people.
Other victims were identified by relatives, or in one case, their school.
Ventura County Sheriff's Office spokesman Capt. Garo Karedjian said Helus was a first responder to the shooting, which began around 11:15 p.m. Wednesday night.
Americans woke up to another mass shooting tragedy on Thursday morning, this time in Thousand Oaks, California at a popular college student spot, Borderline Bar & Grill, which was hosting its weekly 18-and-over College Country Night.
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Police and Federal Bureau of Investigation officers wait outside the home of the suspect in a shooting incident at a Thousand Oaks bar, in Newbury Park, California, U.S. November 8, 2018.
Numerous patrons were local students from nearby California Lutheran University, ages 19 to 25, attending "College Country Night".
"I tried to get as many people to cover as I could", Knapp said.
The alleged shooter's motive is unknown at this time, Dean said.
"He looked like he knew what he was doing", the witness said.
Video accessed by the AP showed law enforcement officers and vehicles speeding to the scene and people running from bar. The sheriff believes Dean took his own life.
People comfort each other as they stand near the scene in Thousand Oaks, Calif., where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people November 8, 2018.
"I've learned it doesn't matter what community you're in", Dean told reporters when asked if he was surprised this happened in Thousand Oaks.
The bar's website says its hosts "College Country Night" every Wednesday.