California gunman went from Marine to divorcee living with mom

THOUSAND OAKS, Calif. (AP) — Ian David Long began his adult life by enlisting in the Marines and getting married. Years after a divorce and a discharge and months after shouting brought a mental health expert to his door, Long killed 12 people at a country music bar outside Los Angeles.

Long, 28, was a former military machine gunner who apparently killed himself after the Wednesday night attack in Thousand Oaks, the quiet suburb where he lived with his mother.

Neighbors said Thursday they would hear loud, aggressive fights between the two. Authorities said they visited that ranch-style house only once, in April, after a neighbor reported yelling and crashing sounds.

Deputies found Long "was somewhat irate, acting a little irrationally" and called in a mental health specialist, Ventura County Sheriff Geoff Dean said. That specialist assessed Long but concluded he couldn't be involuntarily committed for psychiatric observation.

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What we know about Thousand Oaks bar shooting suspect Ian Long
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What we know about Thousand Oaks bar shooting suspect Ian Long

Authorities said Ian David Long 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)

Long was a former Marine and neighbors said he may have struggled with post-traumatic stress disorder.

(AP Photo/Richard Vogel)

Ventura County Sheriff Geoff Dean said his department had several previous contacts with the suspect including a call to his home in April, when deputies found him acting irate and irrationally.

(REUTERS/Ringo Chiu)

The 28-year-old was reportedly a homebody who lived with his mother, Colleen. A neighbor also claimed that Long's mother recently confided that her son was growing "violent," according to ABC News.

(AP Photo/Jae C. Hong)

Long was armed with a legally purchased .45-caliber Glock handgun with an extended magazine, according to local law enforcement officials.

(Photo by Irfan Khan / Los Angeles Times via Getty Images)

Witness told local media outlets that Long was wearing all black with a hood and his face partly covered.

(Photo by Irfan Khan / Los Angeles Times via Getty Images)

According to court records, Ian Long was married in 2009 but the couple seperated in 2011 and divorced in 2013.

 (AP Photo/Richard Vogel)

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"The mental health experts out there cleared him that day," Dean told reporters Thursday, though they were concerned he might be suffering from post-traumatic stress disorder because of his military service.

"Obviously he had something going on in his head that would cause him to do something like this," Dean said.

A next-door neighbor said he called authorities about six months ago when he heard loud banging and shouting at Long's home.

"I was concerned because I knew he had been in the military," neighbor Tom Hanson said Thursday, as federal and local law enforcement officers searched Long's house, where an American flag flew over the garage.

Hanson described Long as an introvert and said he was "dumbfounded" by the massacre.

Long's only other contact with authorities came after a traffic collision and after he alleged he was the victim of a violent encounter in 2015 at another bar in Thousand Oaks, the sheriff said.

Long enlisted in the Marines at 18 and was married as a 19-year-old in Honolulu in June 2009, according to military and court records.

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Mass shooting at Borderline Bar and Grill in Thousands Oaks, California
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Mass shooting at Borderline Bar and Grill in Thousands Oaks, California
THOUSAND OAKS, CA - NOVEMBER 08: Tim Dominguez who was in the bar with his son distraught over the shooting sits under the freeway after a gunman opened fire late Wednesday at a Thousand Oaks bar packed with hundreds of people attending a popular event for college students, causing multiple fatalities on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Irfan Khan / Los Angeles Times via Getty Images)
In this image taken from video a victim is treated near the scene of a shooting, Wednesday evening, Nov. 7, 2018, in Thousand Oaks, Calif. A hooded gunman dressed entirely in black opened fire on a crowd at a country dance bar holding a weekly "college night" in Southern California, killing multiple people and sending hundreds fleeing including some who used barstools to break windows and escape, authorities said Thursday. The gunman was later found dead at the scene. (RMG News via AP)
In this image taken from video a victim is carried from the scene of a shooting, Wednesday evening, Nov. 7, 2018, in Thousand Oaks, Calif. A hooded gunman dressed entirely in black opened fire on a crowd at a country dance bar holding a weekly "college night" in Southern California, killing multiple people and sending hundreds fleeing including some who used barstools to break windows and escape, authorities said Thursday. The gunman was later found dead at the scene. (RMG News via AP)
In this image taken from video a victim is treated near the scene of a shooting, Wednesday evening, Nov. 7, 2018, in Thousand Oaks, Calif. A hooded gunman dressed entirely in black opened fire on a crowd at a country dance bar holding a weekly "college night" in Southern California, killing multiple people and sending hundreds fleeing including some who used barstools to break windows and escape, authorities said Thursday. The gunman was later found dead at the scene. (RMG News via AP)
THOUSAND OAKS, CA - NOVEMBER 08: Police work int he area after a gunman opened fire late Wednesday at a Thousand Oaks bar packed with hundreds of people attending a popular event for college students, causing multiple fatalities on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Irfan Khan / Los Angeles Times via Getty Images)
THOUSAND OAKS, CA - NOVEMBER 08: Security patrol after a gunman opened fire late Wednesday at a Thousand Oaks bar packed with hundreds of people attending a popular event for college students, causing multiple fatalities on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Irfan Khan / Los Angeles Times via Getty Images)
THOUSAND OAKS, CA - NOVEMBER 08: Sarah Rose DeSon talks to friends after a shooter wounded seven Wednesday night on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Al Seib / Los Angeles Times via Getty Images)
THOUSAND OAKS, CA - NOVEMBER 08: People leave the scene after a shooter wounded seven Wednesday night on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Al Seib / Los Angeles Times via Getty Images)
THOUSAND OAKS, CA - NOVEMBER 08: Molly Esterline is hugged by David Crawford on scene after a shooter wounded seven Wednesday night on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Al Seib / Los Angeles Times via Getty Images)
Jason Coffman displays a photo of his son Cody outside the Thousands Oaks Teene Center where he came hoping to find his son who was at the Borderline Bar and Grill in Thousand Oaks, California, on November 8, 2018. - Twelve people, including a police sergeant, were shot dead in a shooting at the bar close to Los Angeles, police said Thursday. All the victims were killed inside the bar in the suburb of Thousand Oaks late on November 7, including the officer who had been called to the scene, Sheriff Geoff Dean told reporters. The gunman was also dead at the scene, Dean added. (Photo by Frederic J. BROWN / AFP) (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
An FBI agent talks to a potential witness as they stand near the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
People comfort each other as they stand near the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
People comfort each other as they sit near the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
THOUSAND OAKS, CA - NOVEMBER 08: FBI setup for investigation at the Borderline and its parking lot after a gunman opened fire late Wednesday at a Thousand Oaks bar packed with hundreds of people attending a popular event for college students, causing multiple fatalities on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Irfan Khan / Los Angeles Times via Getty Images)
THOUSAND OAKS, CA - NOVEMBER 08: Police work in the area after a gunman opened fire late Wednesday at a Thousand Oaks bar packed with hundreds of people attending a popular event for college students, causing multiple fatalities on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Irfan Khan / Los Angeles Times via Getty Images)
THOUSAND OAKS, CA - NOVEMBER 08: Witnesses console each other near the Borderline Bar & Grill after a shooter wounded seven Wednesday night on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Wally Skalij / Los Angeles Times via Getty Images)
THOUSAND OAKS, CA - NOVEMBER 08: Police work in the area with dogs after a gunman opened fire late Wednesday at a Thousand Oaks bar packed with hundreds of people attending a popular event for college students, causing multiple fatalities on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Irfan Khan / Los Angeles Times via Getty Images)
THOUSAND OAKS, CA - NOVEMBER 08: A man speaks with law enforcement personnel as people stand along South Moorpark Road after a gunman opened fire late Wednesday at a Thousand Oaks bar packed with hundreds of people attending a popular event for college students, causing multiple fatalities on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Kent Nishimura / Los Angeles Times via Getty Images)
THOUSAND OAKS, CA - NOVEMBER 08: Nellie Wong cries as Chyann Worrell holds her and Erika Sigman (R) were all inside when shooting started inside the Borderline Bar & Grill when a shooter wounded seven Wednesday night on November 8, 2018 in Thousand Oaks, California. The gunman burst into the bar around 11:20 p.m., cloaked in all black as he threw smoke bombs and began shooting at targets as young as 18 inside the Borderline Bar & Grill, authorities and witnesses said. (Photo by Al Seib / Los Angeles Times via Getty Images)
An American Red Cross Disaster Relief vehicle is seen outside the Thousands Oaks Teen Center where people have come for family assistance following the bar shooting at the Borderline Bar and Grill in Thousand Oaks, California on November 8, 2018. - Twelve people, including a police sergeant, were shot dead in a shooting at the bar close to Los Angeles, police said Thursday. All the victims were killed inside the bar in the suburb of Thousand Oaks late on November 7, including the officer who had been called to the scene, Sheriff Geoff Dean told reporters. The gunman was also dead at the scene, Dean added. (Photo by Frederic J. BROWN / AFP) (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
People comfort each other as they stand near the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
In this image taken from video a victim is treated near the scene of a shooting, Wednesday evening, Nov. 7, 2018, in Thousand Oaks, Calif. A hooded gunman dressed entirely in black opened fire on a crowd at a country dance bar holding a weekly "college night" in Southern California, killing multiple people and sending hundreds fleeing including some who used barstools to break windows and escape, authorities said Thursday. The gunman was later found dead at the scene. (RMG News via AP)
People walk away from the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
People walk away from the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
Sheriff's deputy speaks to a potential witness as they stand near the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
Sheriff's deputies speak to a potential witness as they stand near the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
People comfort each other as they stand near the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
Sheriff's deputies speak to a potential witnesses as they stand near the scene Thursday, Nov. 8, 2018, in Thousand Oaks, Calif. where a gunman opened fire Wednesday inside a country dance bar crowded with hundreds of people on "college night," wounding 11 people including a deputy who rushed to the scene. Ventura County sheriff's spokesman says gunman is dead inside the bar. (AP Photo/Mark J. Terrill)
The inside of the Borderline Bar and Grill is seen after the shooting as police closed off the area in Thousand Oaks, California on November 8, 2018. - Twelve people, including a police sergeant, were shot dead in a shooting at a night club close to Los Angeles, police said Thursday. All the victims were killed inside the bar in the suburb of Thousand Oaks late on Wednesday, including the officer who had been called to the scene, Sheriff Geoff Dean told reporters. The gunman was also dead at the scene, Dean added. The bar was hosting a college country music night. (Photo by Frederic J. BROWN / AFP) (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
People gather as close as they can to the Borderline Bar and Grill in Thousand Oaks, California on November 8, 2018 as police vehicles closed off the area responding to a shooting. - Twelve people, including a police sergeant, were shot dead in a shooting at a night club close to Los Angeles, police said Thursday. All the victims were killed inside the bar in the suburb of Thousand Oaks late on Wednesday, including the officer who had been called to the scene, Sheriff Geoff Dean told reporters. The gunman was also dead at the scene, Dean added. The bar was hosting a college country music night. (Photo by Frederic J. BROWN / AFP) (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
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His military service lasted nearly five years, and he was honorably discharged with the rank of corporal in 2013, the Pentagon said. He was part of the infantry, responsible for hauling and shooting machine guns.

During his service, Long's marriage fell apart. He and his wife separated in June 2011, while he was deployed on a seven-month tour in Afghanistan. The couple cited irreconcilable differences in divorce papers filed in May 2013, two months after Long left the Marines.

Later, he enrolled at nearby California State University, Northridge, last attending in 2016, the school said in a statement.

More recently he was living in a home where neighbors said they could hear frequent, aggressive shouting between Long and his mother, especially over the last year.

About 18 months ago, Don and Effie MacLeod heard "an awful argument" and what he believes was a gunshot from the Longs' property. Don MacLeod said he did not call police but avoided speaking with Ian Long.

"I told my wife, 'Just be polite to him. If he talks, just acknowledge him, don't go into conversation with him,'" Don MacLeod said Thursday.

Sparse pictures on social media showed a happy Long family. His mother, Colleen, posted Facebook photos of her son in his military uniform in 2010 and 2011.

"My Son is home, well sort of, back in Hawaii, soon to be in Cali come January, hooray!" she wrote on Dec. 14, 2012.

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Victims of the Borderline Bar & Grill shooting in Thousand Oaks, California
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Victims of the Borderline Bar & Grill shooting in Thousand Oaks, California

Friends remembered Kristina Kaylee Morisette as a bubbly, happy person. "I saw Kristina walking around right before it happened … It still seems like a dream. I just can't believe it," said a friend of her's.

(Photo: Facebook)

Alaina Housley, an 18-year-old freshman at Pepperdine University was killed. Alaina's aunt and actress Tamera Mowry released a statement saying her niece was one of the victims. Mowry is married to former Fox News national correspondent Adam Housley who said, "you just don’t think that — same stupid quote — you just don’t think it’s going to happen to you."

(Photo: Twitter)

Cody Coffman's father, Jason Coffman, identified his 22-year-old son as one of the victims killed in the shooting at Borderline Bar and Grill in Thousand Oaks, California.

"Cody was the big brother that my kids need," Jason Coffman said during a Thursday press conference. "I have a daughter coming on the 29th of this month, and [Cody] was so excited to have his first sister," he said. "And now she'll never know him."

(FREDERIC J. BROWN/AFP/Getty Images)

California Lutheran University confirmed that recent graduate, Justin Meek, was killed in the shooting. The 23-year-old was reportedly working as a bouncer at the bar.

(Photo: Facebook/Justin Meek)

Ventura County Sheriff's Sgt. Ron Helus, who was killed Wednesday, Nov. 7, 2018, in a deadly shooting at a country music bar in Thousand Oaks, Calif.

(Ventura County Sheriff's Department via AP)

Telemachus Orfanos, 27, was a U.S. Navy veteran and his friends called him "Tel," according to the Associated Press. His mother spoke with ABC7 and said, "I hope to God no one sends me anymore prayers. I want gun control. No more guns!"

(Photo: Facebook)

Noel Sparks was identified as one of the victims of the shooting by United Methodist Church Westlake Village on Facebook.

(Photo: Facebook)

#BreakingNews: The family of Sean Adler confirms he is among the victims of the #BorderlineBarShooting; Adler is su… https://t.co/pG0955zHQ2

Dan Manrique was a 33-year-old former Marine Corps radio operator and head of the Ventura County chapter of veterans non-profit Team Red, White & Blue.

(Photo: Facebook)

Marky Meza Jr., 20, was working as a busboy at Borderline Bar & Grill when he was killed.

(Photo: Facebook)

Jake Dunham, 21, was at Borderline on Wednesday night with his friend, Blake Dingman. Both were killed in the attack.

(Photo: Facebook)

Blake Dingman, 21, was reportedly a well-known local athlete who played high school baseball at Hillcrest Christian School in Thousand Oaks.

"We were really proud of him," his aunt, Janet Dingman, told PE.com in a phone interview. “He was a really, fun, energetic and loving nephew.”

(Photo: Instagram)

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Another photo from 2014 shows Ian Long with his arm draped around his mother in front of Dodger Stadium. The two were wearing Dodgers T-shirts and smiles.

Authorities haven't identified what motivated Long to open fire during college night at Borderline Bar & Grill in Thousand Oaks, around 40 miles from downtown Los Angeles. The city of about 130,000 people is consistently near the top of lists ranking the safest places in California.

The dead included 11 people inside the bar and a veteran sheriff's sergeant who was the first officer through the door.

The Marine Corps said Long earned several awards, including a Combat Action Ribbon and a Marine Corps Good Conduct Medal. He was assigned to the 2nd Battalion, 3rd Marine Regiment, Third Marine Division in Kaneohe Bay, Hawaii.

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Pritchard reported from Los Angeles. Contributing were Michael Kunzelman in College Park, Maryland; Tami Abdollah and Lolita Baldor in Washington; Alina Hartounian in Phoenix; and Reese Dunklin in Dallas.

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