Details Emerge About Navy Yard Shooter's Checkered PastThe investigation into the mass shooting at the Washington Navy Yard continues with no clear motive for why Aaron Alexis opened fire, killing 12 people. He was killed in a gun battle with police. He was working at the Navy Yard as an electrical contractor.
13 Dead, Including Lone Gunman, In Navy Yard Rampage An employee at a defense contractor used his pass to get into the Washington Navy Yard and went on a deadly shooting rampage Monday, spraying bullets in the hallways and firing from a balcony on workers in an atrium below. Thirteen people were killed, including the gunman. The motive for the attack — the deadliest mass shooting on a military installation in the U.S. since the tragedy at Fort Hood, Texas, in 2009 — was a mystery, investigators said. Mayor Vincent Gray said there was no indication it was a terrorist attack, but he added that the possibility had not been ruled out.