DC Shooting suspect Aaron Alexis - Who was he?

Photo of dead gunman, Aaron Alexis

WASHINGTON -- Aaron Alexis had a history with guns.

The 34-year-old Navy reservist, the suspect in a shooting rampage at the Navy Yard that left 13 dead, including himself, was arrested in 2010 for firing a gun through the ceiling of his apartment in Fort Worth, Texas, according to a police report. He said it had been an accident.

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Alexis enlisted in the Navy in 2007 and was an aviation electrician's mate 3rd Class in 2009. He served with the Fleet Logistics Support Squadron in Fort Worth from February 2008 to January 2011.

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Alexis lived most recently in New York City, the Navy said, and had relatives in Georgia and Seattle, Wash., according to public reports. He last voted in Queens, N.Y., in 2000.

The Fort Worth Star-Telegram located a self-described "best friend" of Alexis' Monday who expressed surprise at the news and said Alexis had been working for a computer contractor.

"He lived with me three years," Nutpisit Suthamtewakul, owner of Happy Bowl Thai, told the newspaper. "I don't think he'd do this. He has a gun. but I don't think he's that stupid. He didn't seem aggressive to me."

A short LinkedIn profile of Alexis said he attended Embry-Riddle Aeronautical University and worked as a network technician at SinglePoint Technologies.

Valerie Parlave, chief of the FBI's D.C. field division, appealed for the public's help to assist in providing information about the shooter's actions and movements prior to the attack. The FBI posted the dead shooter's photographs on its website.

Here's some more information about the suspect:

NAME: Aaron Alexis.

AGE: 34 (born May 9, 1979).

HOMETOWN: New York City.

LAST RESIDENCE: Fort Worth, Texas.

OCCUPATION: Worked for The Experts, a subcontractor on an HP Enterprise Services contract to refresh equipment used on the Navy Marine Corps Intranet network. Navy reservist from 2007-2011; left as a petty officer 3rd class, stationed in Fort Worth. After discharge, worked as a waiter and delivery driver at the Happy Bowl Thai restaurant in White Settlement, a suburb of Fort Worth, until May 2013.

EDUCATION: Was pursuing a bachelor's degree in aeronautics via online classes at Embry-Riddle Aeronautical University.

RELIGION: Converted to Buddhism and was devout, wanting to become an ordained monk, according to friends.

ARREST RECORD: In September 2010, Alexis was arrested on suspicion of discharging a firearm within city limits after a neighbor reported she was nearly shot by a bullet fired from his downstairs apartment. He told police his gun accidentally discharged while he was cleaning it, and no charges were filed. In May 2004, he was arrested in Seattle for shooting out the tires of another man's vehicle in what he later described to detectives as an anger-fueled "blackout."

QUOTE: "I wouldn't call him nice, but he seemed harmless, if really awkward," said Gene Demby of Philadelphia, who said he dated one of Alexis' younger sisters in the early 2000s. "He was insecure. He was like a barbershop conspiracy theorist, the kind of guy who believes he's smarter than everyone else. He also was kind of like perpetually aggrieved, but not megalomaniacal or delusional."