(Photo: Handout via AP)
(Courtesy ABC News)
WASHINGTON (USA TODAY) -- Aaron Alexis had a history with guns.
The Fort Worth resident was arrested in 2010 for firing a gun through the ceiling of his apartment, according to a police report. He said it was an accident.
Alexis, 34, lived most recently in Texas but spent much of his life in the New York City area and appears to have many relatives there. He last voted in Queens, N.Y., in 2000.
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He also appears to have family ties to Georgia and Washington State.
The Forth 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."
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.
Contributing: Rick Jervis in Texas and Kevin Johnson in Washington, D.C.