Gunman who killed 12 died from self-inflicted gunshot

Gunman who killed 12 died from self-inflicted gunshot
A bouquet of flowers, left by mourners, lays near the site of Wednesday's mass shooting, in Thousand Oaks, Calif., Friday, Nov. 9, 2018. Investigators continue to work to figure out why an ex-Marine opened fire Wednesday evening inside a Southern California country music bar, killing multiple people. (AP Photo/Damian Dovarganes) (Damian Dovarganes)

THOUSAND OAKS, Calif. (AP) — An autopsy determined that the gunman who killed 12 people at a Southern California bar died from a self-inflicted gunshot, police said Saturday.

Ian David Long, a 28-year-old ex-Marine machine-gunner, fatally shot 11 people at the Borderline Bar and Grill in Thousand Oaks and a police officer who responded just before midnight Wednesday. The officer exchanged gunfire with Long, who was found dead at the scene.

Ventura County Sheriff Bill Ayub said an autopsy determined Long fatally shot himself.

Authorities have yet to determine a motive and are exploring all possibilities. Among them is whether Long believed a former girlfriend might have been at the bar, which was filled with about 150 people on its popular college night that attracts students from several nearby schools.

Sheriff's Capt. Garo Kuredjian said investigators were still interviewing witnesses, have served a search warrant at Long's home and searched the car Long drove to the bar.

Ventura County Sheriff's Office Capt. Garo Kuredjian, left, embraces chaplains with the Billy Graham Rapid Response Team (RRT) as they pray near the site of Wednesday's mass shooting in Thousand Oaks, Calif., Friday Nov. 9, 2018. Investigators continue to work to figure out why an ex-Marine opened fire Wednesday evening inside a Southern California country music bar, killing multiple people. (AP Photo/Damian Dovarganes)
Ventura County Sheriff's Office Capt. Garo Kuredjian, left, embraces chaplains with the Billy Graham Rapid Response Team (RRT) as they pray near the site of Wednesday's mass shooting in Thousand Oaks, Calif., Friday Nov. 9, 2018. Investigators continue to work to figure out why an ex-Marine opened fire Wednesday evening inside a Southern California country music bar, killing multiple people. (AP Photo/Damian Dovarganes) (AP)

"We're going to exhaust every investigative means possible," Kuredjian told the Ventura County Star.

This 2017 photo from the California Department of Motor Vehicles shows Ian David Long. Authorities said the Marine combat veteran opened fire Wednesday evening, Nov. 7, 2018, at a country music bar in Southern California, killing multiple people before apparently taking his own life. (California Department of Motor Vehicles via AP)
This 2017 photo from the California Department of Motor Vehicles shows Ian David Long. Authorities said the Marine combat veteran opened fire Wednesday evening, Nov. 7, 2018, at a country music bar in Southern California, killing multiple people before apparently taking his own life. (California Department of Motor Vehicles via AP) (AP)

Kuredjian said there is no timeline for completing the investigation. The analysis of items obtained in the searches could take months, he said.

Police block the entrance to the parking lot leading to the Borderline Bar & Grill in Thousand Oaks, Calif., Thursday, Nov. 8, 2018. A gunman opened fire Wednesday evening inside a country music bar, killing multiple people. Terrified patrons hurled barstools through windows to escape or threw their bodies protectively on top of friends as a Marine combat veteran killed multiple people at a country music bar in an attack that added Thousand Oaks to the tragic roster of American cities traumatized by mass shootings.(AP Photo/Damian Dovarganes)
Police block the entrance to the parking lot leading to the Borderline Bar & Grill in Thousand Oaks, Calif., Thursday, Nov. 8, 2018. A gunman opened fire Wednesday evening inside a country music bar, killing multiple people. Terrified patrons hurled barstools through windows to escape or threw their bodies protectively on top of friends as a Marine combat veteran killed multiple people at a country music bar in an attack that added Thousand Oaks to the tragic roster of American cities traumatized by mass shootings.(AP Photo/Damian Dovarganes) (AP)

Former Sheriff Geoff Dean, whose last day on the job was Friday, said investigators believe Long targeted the bar but don't know why. At least a half-dozen people interviewed by The Associated Press who described themselves as regulars at the bar don't ever recall seeing Long there.

FBI investigators join law enforcement as they work near the scene of Wednesday's shooting in Thousand Oaks, Calif., Friday, Nov. 9, 2018. Investigators continue to work to figure out why an ex-Marine opened fire Wednesday evening inside a country music bar, killing multiple people. (AP Photo/Damian Dovarganes)
FBI investigators join law enforcement as they work near the scene of Wednesday's shooting in Thousand Oaks, Calif., Friday, Nov. 9, 2018. Investigators continue to work to figure out why an ex-Marine opened fire Wednesday evening inside a country music bar, killing multiple people. (AP Photo/Damian Dovarganes) (AP)

Authorities described an attack of military efficiency . When Long shot his .45-caliber pistol, he killed. All of the injured suffered cuts, bruises and other minor injuries in frantic attempts to escape the gunfire. Some smashed windows and jumped out.

People gather outside the Rivalry Roasters coffee shop for a vigil for Sean Adler Thursday, Nov. 8, 2018, in Simi Valley, Calif. Adler was killed in Wednesday night's shooting at the Borderline Bar and Grill in Thousand Oaks, Calif. (AP Photo/Jae C. Hong)
People gather outside the Rivalry Roasters coffee shop for a vigil for Sean Adler Thursday, Nov. 8, 2018, in Simi Valley, Calif. Adler was killed in Wednesday night's shooting at the Borderline Bar and Grill in Thousand Oaks, Calif. (AP Photo/Jae C. Hong) (AP)

Based on time stamps, investigators say, Long posted to Instagram during the attack. The post involved his mental state and whether people would believe he was sane.

People gather to pray for the victims of the mass shooting during a candlelight vigil in Thousand Oaks , Calif., Thursday, Nov. 8, 2018. A gunman opened fire Wednesday evening inside a country music bar, killing multiple people. (AP Photo/Ringo H.W. Chiu)
People gather to pray for the victims of the mass shooting during a candlelight vigil in Thousand Oaks , Calif., Thursday, Nov. 8, 2018. A gunman opened fire Wednesday evening inside a country music bar, killing multiple people. (AP Photo/Ringo H.W. Chiu) (AP)

His social media accounts have been taken down but a law enforcement official said Long posted about his mental state and whether people would believe he was sane. The official, who was briefed on the investigation but not authorized to discuss it publicly, spoke to The Associated Press on condition of anonymity.

A picture of Noel Sparks is seen during a candlelight vigil in Thousand Oaks, Calif., Thursday, Nov. 8, 2018. A gunman opened fire Wednesday evening inside a country music bar, killing multiple people. (AP Photo/Ringo H.W. Chiu)
A picture of Noel Sparks is seen during a candlelight vigil in Thousand Oaks, Calif., Thursday, Nov. 8, 2018. A gunman opened fire Wednesday evening inside a country music bar, killing multiple people. (AP Photo/Ringo H.W. Chiu) (AP)

Long grew up in Thousand Oaks and several people who knew him described him in disturbing terms. Long made others feel uncomfortable going back to his teens.

Thousand Oaks residents await to claim their vehicles as FBI agents verify vehicle registrations of autos parked in the lot of the Borderline Bar & Grill bar in Thousand Oaks, Calif., Friday, Nov. 9, 2018. The gunman who killed 12 people at the country music bar in Southern California went on social media during the attack and posted about his mental state and whether people would believe he was sane, a law enforcement official said Friday. (AP Photo/Damian Dovarganes)
Thousand Oaks residents await to claim their vehicles as FBI agents verify vehicle registrations of autos parked in the lot of the Borderline Bar & Grill bar in Thousand Oaks, Calif., Friday, Nov. 9, 2018. The gunman who killed 12 people at the country music bar in Southern California went on social media during the attack and posted about his mental state and whether people would believe he was sane, a law enforcement official said Friday. (AP Photo/Damian Dovarganes) (AP)

Dominique Colell, who coached girls' track and field at the high school where Long was a sprinter, remembers an angry young man who could be verbally and physically combative.

People hug as they arrive to recover their vehicles parked in the parking lot the Borderline Bar & Grill bar in Thousand Oaks, Calif., Friday, Nov. 9, 2018. The gunman who killed 12 people at the country music bar in Southern California went on social media during the attack and posted about his mental state and whether people would believe he was sane, a law enforcement official said Friday. (AP Photo/Damian Dovarganes)
People hug as they arrive to recover their vehicles parked in the parking lot the Borderline Bar & Grill bar in Thousand Oaks, Calif., Friday, Nov. 9, 2018. The gunman who killed 12 people at the country music bar in Southern California went on social media during the attack and posted about his mental state and whether people would believe he was sane, a law enforcement official said Friday. (AP Photo/Damian Dovarganes) (AP)

In one instance, Colell said Long used his fingers to mimic shooting her in the back of the head as she talked to another athlete. In another, he grabbed her rear and midsection after she refused to return a cellphone he said was his.

A flag is seen partially wrapped up in its pole due to heavy winds, outside the home of the ex-Marine Ian David Long, who killed 12 people at a country music bar Wednesday, in Newbury Park, Calif., Friday, Nov. 9, 2018. Wildfire smoke fills the sky in the background. (AP Photo/Damian Dovarganes)
A flag is seen partially wrapped up in its pole due to heavy winds, outside the home of the ex-Marine Ian David Long, who killed 12 people at a country music bar Wednesday, in Newbury Park, Calif., Friday, Nov. 9, 2018. Wildfire smoke fills the sky in the background. (AP Photo/Damian Dovarganes) (AP)

"I literally feared for myself around him," Colell said in an interview Friday. "He was the only athlete that I was scared of."

Police said Long had no criminal record. However, last April, yelling and loud banging noises coming from the home Long shared with his mother prompted a next-door neighbor to call authorities .

Deputies responded and a mental health specialist who assessed Long worried he might be suffering from post-traumatic stress disorder but found no grounds to hospitalize him.