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The FBI identified Aaron Alexis, a 34-year-old military contractor from Texas, as the perpetrator of the shooting rampage at the Washington Navy Yard on Monday, September 16. Authorities said at least 12 people -- and Alexis -- were killed in the shooting. FBI
Two days before the shooting, Alexis spent "a couple hours" shooting at Sharpshooters Small Arms Range in northern Virginia before buying the Remington 870 shotgun -- after being approved by the federal background check -- and a small amount of ammunition, the store's attorney, J. Michael Slocum, said. Brian Yaklyvich/CNN
Alexis appears to have had sporadic run-ins with the law, dating to at least 2004. Authorities are still searching for more information about him, and they're asking the public for help. FBI
CNN obtained a series of images of Alexis from Kristi Suthamtewakul, the wife of his friend and former roommate Nutpisit Suthamtewakul, owner of the Happy Bowl Thai restaurant in Fort Worth, Texas, where Alexis used to work. Courtesy Kristi Suthamtewakul
Nutpisit Suthamtewakul reeled at the news that Alexis was involved in the rampage at the Navy Yard. "I can't believe he did this," he said. "He never showed any sign of violence." Courtesy Kristi Suthamtewakul
Alexis, who was from New York, served as a full-time Navy reservist between 2007 and 2011, according to military records. Courtesy Kristi Suthamtewakul
His last known address was outside Fort Worth, Texas. Courtesy Kristi Suthamtewakul
Authorities have not released a possible motive for the shooting. Courtesy Kristi Suthamtewakul
