The Bureau of Alcohol, Tobacco, and Firearms said at a press conference Friday that 13 firearms were recovered from the person and residence of Chris Harper Mercer, the 26-year-old who fatally shot nine people at Umpqua Community College in Oregon on Thursday. The ATF said all the weapons were purchased legally, either by Mercer or his family members. Mercer was also wearing a flak jacket, which included five ammunition magazines.
