Oregon shooting: Umpqua gunman Chris Harper Mercer -- what we know

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Officials Recover Six Weapons on Umpqua Campus

The heavily armed gunman who slaughtered nine people at an Oregon college left a hate-filled note at the scene of his rampage and "felt the world was against him," law enforcement officials confirmed Friday.

Two officials familiar with the contents of the note say 26-year-old Christopher Harper Mercer, who was killed in a firefight Thursday with police at Umpqua Community College, wrote that he would be "welcomed in Hell and embraced by the devil."

READ MORE: Gunman kills 9 at Oregon college, dies in shootout with police

He wrote that he was "in a bad way," one official said. "He was depressed, sullen."
The officials said Mercer lamented the fact that he did not have a girlfriend. "He said he had no life," another official said.

Former acquaintances and social-media postings paint a picture of Mercer as a withdrawn young man who spent a lot of time on the Internet.

See photos of the gunman and scenes from the shooting:

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Oregon shooting: Umpqua gunman Chris Harper Mercer -- what we know

Chris Harper-Mercer, 26

Photo via Myspace 

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He appeared to be sympathetic to the predominantly Catholic Irish Republican Army — but also posted online that he was "not religious."

Public records show that one person of that name was born in Los Angeles County in 1989. Police declined to confirm the shooter's identity late Thursday and during a news conference Friday, in an attempt to not "glorify" the actions of the gunman who killed nine people and wounded nine others.

Authorities told reporters that the shooter had amassed 13 weapons — all purchased legally by either him or a family member from a federal gun dealer.

Six of the weapons were recovered at the scene and seven from his home, said Celinez Nunez, an assistant special agent in charge with the Bureau of Alcohol, Tobacco, Firearms and Explosives. The guns taken from the home were two pistols, four rifles and one shotgun, the Douglas County Sheriff's Office said.

In addition, investigators at the school recovered a flak jacket with steel plates lying next to a rifle and five magazines. Additional ammunition was found in the home, Nunez said.

See social media reactions to the shooting (WARNING: Some may contain strong language):

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Oregon school shooting, UCC, social reactions
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Oregon shooting: Umpqua gunman Chris Harper Mercer -- what we know
Terrible news coming out of Roseburg. My thoughts and prayers are with the victims, their families, and the community.
On a plane and learning about the heinous shooting in Oregon. A community’s heart has been tested but will not be broken. #UCCShooting
Was boarding a plane as I learned about the horrific shooting in Oregon. Thoughts and prayers are w/the Roseburg community. #UCCShooting
My thoughts are with the families and victims of today's tragedy.
Prayers for those in Oregon dealing w/ yet another mass shooting... 😔
My heart is with those who lost so much today in Oregon. -O’M
Another senseless tragedy with more innocent people killed. Our hearts go out to the families. -B
My heart goes out to all affected by #Umpqua shooting. How many gunshots before legislators start listening? #GunReform #UCCShooting
Praying for those affected by the shooting at Umpqua community college today. I'll be keeping you all in my thoughts.
Can't wrap my head around the fact that one of my best friends since birth was the only person in the whole class not shot.
I am completely devastated! My heart goes out to my hometown and college #UmpquaCommunityCollege Pray for #Roseburg! https://t.co/SSml4AjK2I
Another tragic shooting. This one hits home being from Roseburg. Spent a lot of time on UCC campus as a kid. 🙏 https://t.co/9NerF6sCPA
So stunned & angry about yet another mass shooting, this time on a college campus in Oregon. We pray for the victims & their families.
Stunned by reports of a shooting in my home state of OR. My thoughts & prayers are w/ UCC as we struggle to cope w/ this tragedy.
My thoughts and prayers are with the victims of today's tragic shooting in Roseburg: https://t.co/O4lF8YcnVy
Sick to my stomach man. My next class was at snyder, can't even process all this.
#UCCShooting leaves us w/ a profound sense of loss. We should work in whatever ways we can to prevent these acts of violence in the future
Active shooter reported at Umpqua Community College. One person reported shot.
Students are running everywhere. Holy God.
Oregon shooter brought down. Multiple rescue units requested. First reports 20 victims.
My heart is broken. 💔 praying for our little community today. 🙏🏼
If something happens to my mom rn at ucc I will go to prison
My mom works at UCC and my brother goes to school there. This is so fucking scary
Literally bawling my eyes out & can't calm down
I feel so sick & can't stop shaking. This is unreal
My grandparents, aunt and uncle live across the street from UCC. This is unreal.
Scariest thing I've ever experienced...
I was getting ready to get out of my car to go to class and my papa stopped me and told me to get the f*ck off campus
Heartbroken. Again. #prayersforUmpqua
Authorities check bags as students and staff are moved off campus at Umpqua Community College after shooting report. https://t.co/BvvHh0UYqN
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Douglas County Sheriff John Hanlin told reporters it wouldn't be strange for someone in the state to have so many weapons.

"In Oregon, this is a hunting state and firearms are possible in most households," he said.
Investigators said it was too soon to identify a motive, although Hanlin earlier told NBC's TODAY he wasn't aware of any "specific red flags" for the shooter.

"He is a local resident and I know personally I haven't heard of any warning signs coming from this person," Hanlin said.

Mercer had enlisted in the U.S. Army and was stationed at Fort Jackson, South Carolina, from Nov. 5 to Dec. 11, 2008, Army officials said. But he was discharged for "failing to meet the minimum administrative standards to serve," the Army added.

A Myspace page that appeared to be linked to the shooter featured Mercer holding what appeared to be a rifle while several other postings were sympathetic to the Irish Republican Army and featured masked gunmen and logos.

See photos from the vigils held for the Oregon shooting victims:

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Oregon school shooting vigils, Umpqua Community College
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Oregon shooting: Umpqua gunman Chris Harper Mercer -- what we know
ROSE BURG, OR - OCTOBER 09: A general view of a makeshift memorial including flowers and drawings outside Snyder Hall on the Umpqua Community College Campus on October 9, 2015 in Roseburg, Oregon. Snyder Hall is where a gunman killed eight students and a writing teacher and injured nine others in a campus shooting on October 1, 2015. (Photo by Steve Dykes/Getty Images)
ROSE BURG, OR - OCTOBER 09: A close up of hearts with the names of the victims are part of a makeshift memorial near the campus of Umpqua Community College Campus on October 9, 2015 in Roseburg, Oregon. A gunman killed eight students and a writing teacher and injured nine others in a campus there in a shooting on October 1, 2015. (Photo by Steve Dykes/Getty Images)
ROSE BURG, OR - OCTOBER 09: A general view of a makeshift memorial and black plastic tarp outside Snyder Hall on the Umpqua Community College Campus on October 9, 2015 in Roseburg, Oregon. Snyder Hall is where a gunman killed eight students and a writing teacher and injured nine others in a campus shooting on October 1, 2015. (Photo by Steve Dykes/Getty Images)
ROSE BURG, OR - OCTOBER 09: A general view of a makeshift memorial near the campus of Umpqua Community College Campus on October 9, 2015 in Roseburg, Oregon. A gunman killed eight students and a writing teacher and injured nine others in a campus there in a shooting on October 1, 2015. (Photo by Steve Dykes/Getty Images)
ROSE BURG, OR - OCTOBER 09: Bayleigh Case (4) of Roseburg look at the flowers and balloons at a makeshift memorial near the campus of Umpqua Community College Campus on October 9, 2015 in Roseburg, Oregon. A gunman killed eight students and a writing teacher and injured nine others in a campus there in a shooting on October 1, 2015. (Photo by Steve Dykes/Getty Images)
Hundreds of people gather for a vigil in Roseburg, Oregon on October 1, 2015, for ten people killed and seven others wounded in a shooting at a community college in the western US state of Oregon. The 26-year-old gunman, identified by US media as Chris Harper Mercer, was killed following a shootout with police. A visibly angry President Barack Obama made an impassioned plea for gun control in the wake of the shooting, blasting Congress for its failure to act in the face of 'routine' mass killings. AFP PHOTO/JOSH EDELSON (Photo credit should read Josh Edelson/AFP/Getty Images)
A woman cries while holding her daughter during a vigil in Roseburg, Oregon on October 1, 2015, for ten people killed and seven others wounded in a shooting at a community college in the western US state of Oregon. The shooter -- identified by US media as Chris Harper Mercer, 26 -- opened fire in a classroom at Umpqua Community College in rural Roseburg, then moved to other rooms methodically gunning down his victims, witnesses said. AFP PHOTO / JOSH EDELSON (Photo credit should read Josh Edelson/AFP/Getty Images)
A girl prays during a vigil in Roseburg, Oregon on October 1, 2015, for ten people killed and seven others wounded in a shooting at a community college in the western US state of Oregon. The 26-year-old gunman, identified by US media as Chris Harper Mercer, was killed following a shootout with police. A visibly angry President Barack Obama made an impassioned plea for gun control in the wake of the shooting, blasting Congress for its failure to act in the face of 'routine' mass killings. AFP PHOTO/JOSH EDELSON (Photo credit should read Josh Edelson/AFP/Getty Images)
A young woman reacts during a vigil in Roseburg, Oregon on October 1, 2015, for ten people killed and seven others wounded in a shooting at a community college in the western US state of Oregon. The shooter -- identified by US media as Chris Harper Mercer, 26 -- opened fire in a classroom at Umpqua Community College in rural Roseburg, then moved to other rooms methodically gunning down his victims, witnesses said. AFP PHOTO / JOSH EDELSON (Photo credit should read Josh Edelson/AFP/Getty Images)
People hold candles during a vigil in Roseburg, Oregon on October 1, 2015, for ten people killed and seven others wounded in a shooting at a community college in the western US state of Oregon. The shooter -- identified by US media as Chris Harper Mercer, 26 -- opened fire in a classroom at Umpqua Community College in rural Roseburg, then moved to other rooms methodically gunning down his victims, witnesses said. AFP PHOTO / JOSH EDELSON (Photo credit should read Josh Edelson/AFP/Getty Images)
Mourners react during a vigil in Roseburg, Oregon on October 1, 2015, for ten people killed and seven others wounded in a shooting at a community college in the western US state of Oregon. The 26-year-old gunman, identified by US media as Chris Harper Mercer, was killed following a shootout with police. A visibly angry President Barack Obama made an impassioned plea for gun control in the wake of the shooting, blasting Congress for its failure to act in the face of 'routine' mass killings. AFP PHOTO/JOSH EDELSON (Photo credit should read Josh Edelson/AFP/Getty Images)
ROSEBURG, OREGON - OCTOBER 1: Governor Kate Brown of Oregon attends at a candlelight vigil for the victims of a shooting at Umpqua Community College October 1, 2015 in Roseburg, Oregon. According to reports, 10 were killed and 20 injured when a gunman opened fire at Umpqua Community College in Roseburg, Oregon. (Photo by Michael Lloyd/Getty Images)
A girl who allegedly had multiple family members involved in a shooting at her college campus, reacts during a vigil in Roseburg, Oregon on October 1, 2015, for ten people have been confirmed killed and seven others wounded in a shooting at a community college in the western US state of Oregon, a local official said. The 26-year-old gunman, identified by US media as Chris Harper Mercer, was killed following a shootout with police. A visibly angry President Barack Obama made an impassioned plea for gun control in the wake of the shooting, blasting Congress for its failure to act in the face of 'routine' mass killings. AFP PHOTO/JOSH EDELSON (Photo credit should read Josh Edelson/AFP/Getty Images)
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The IRA is a predominantly Catholic paramilitary group which waged a bloody three-decade campaign to make Northern Ireland an independent republic separate from Great Britain. It was responsible for terrorist attacks in Northern Ireland and England, including an attempt to assassinate British Prime Minister Margaret Thatcher by bombing a hotel in 1984. More than 3,600 people were killed in the armed conflict.

The Myspace account -- which is listed under Chris Harper-Mercer -- also featured a formal photo with a caption reading "me in a tuxedo on the day of my sister's wedding."

A man listing the same birthday -- and whose photo strongly resembles Mercer -- also held a profile on a dating and penpal site for "spiritual singles" that listed Los Angeles as his location.

"Looking for someone who shares my beliefs, and is similar to me," the profile says, listing "Internet, killing zombies, movies, music" and reading among hobbies and interests.

The profile describes "not religious, but spiritual" beliefs and was linked to a group called "doesn't like organized religion."

Earlier reports, citing a survivor's account as told to relatives, said that Harper Mercer asked people whether they were Christian before firing. But J.J. Vicari, who was in the classroom next to the where the attack occurred, said he never heard the gunman ask about religion and never even heard the gunman's voice.

Sci-fi and horror were listed as favorite types of movies on the Myspace profile -- along with romantic comedies.

The profile described the poster as "shy at first, but warm up quickly" and "better in small groups" -- consistent with what Mercer's acquaintances said.

Former neighbors in the Los Angeles suburb of Torrance confirmed that Mercer lived with his mother in a downstairs apartment before moving to Oregon about four years ago.

Bryan Clay said he'd encounter the shooter "every day" when he'd come home from school -- and that Mercer kept to himself.

"I'd see Chris, shaved head, combat boots, camo pants and a plain brown or white shirt," Clay told NBC Los Angeles. "He would really just walk really fast, avoid anybody who came towards him."

Mercer's father, though, told NBC Los Angeles his son was a "nice guy" who "put everyone before himself."

An online public records search for Chris Harper Mercer shows one man by that name having lived in Torrance before moving to an apartment in Winchester, Oregon — just 2.1 miles from Umpqua Community College. NBC News could not immediately verify whether it referred to the gunman.

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Oregon shooting: Umpqua gunman Chris Harper Mercer -- what we know
TOPSHOT - Mourners hold up signs during a vigil in Washington, DC on June 12, 2016, in reaction to the mass shooting at a gay nightclub in Orlando, Florida. Fifty people died when a gunman allegedly inspired by the Islamic State group opened fire inside a gay nightclub in Florida, in the worst terror attack on US soil since September 11, 2001. / AFP / Andrew Caballero-Reynolds (Photo credit should read ANDREW CABALLERO-REYNOLDS/AFP/Getty Images)
ORLANDO, FL - JUNE 12: FBI agents investigate near the damaged rear wall of the Pulse Nightclub where Omar Mateen allegedly killed at least 50 people on June 12, 2016 in Orlando, Florida. The mass shooting killed at least 50 people and injuring 53 others in what is the deadliest mass shooting in the countryÃs history. (Photo by Joe Raedle/Getty Images)
WEST HOLLYWOOD, CA - JUNE 12: A guest holds a sign remembering the Orlando Massacre at the LA PRIDE Music Festival and Parade 2016 on June 10, 2016 in West Hollywood, California. (Photo by Joe Scarnici/WireImage)
BLACKSBURG, VA - APRIL 17: Thousands of people attend a candlelight vigil on the campus of Virginia Tech April 17, 2007 in Blacksburg, Virginia. According to police, English major Cho Seung-Hui, 23, a native of South Korea, went on a shooting rampage that left a total of 33 people dead. It was the worst mass shooting in U.S. history. (Photo by Chip Somodevilla/Getty Images)
LITTLETON, CO - APRIL 20: (VIDEO CAPTURE) Columbine high school shooters Eric Harris (L) and Dylan Klebold appear in this video capture of a surveillance tape released by the Jefferson County Sheriff's Department in the cafeteria at Columbine High School April 20, 1999 in Littleton, CO during their shooting spree which killed 13 people. (Photo courtesy of Jefferson County Sheriff's Department via Getty Images)

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KILLEEN, TX - NOVEMBER 5: Sgt. Fanuaee Vea embraces Pvt. Savannah Green while trying to reach friends and family outside Fort Hood on November 5, 2009 in Killeen, Texas. At least one gunman killed 12 people and injured 31 in a shooting on a military base at Fort Hood this afternoon. One shooter was killed by military police and at least two other soldiers are in custody. (Photo by Ben Sklar/Getty Images)

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