A police officer stands guard at the front gate of the Washington Naval Yard Tuesday in Washington, D.C.
A police officer stands guard at the front gate of the Washington Naval Yard Tuesday in Washington, D.C. MCT
A police officer stands guard at the front gate of the Washington Naval Yard Tuesday in Washington, D.C. MCT

Alleged D.C. gunman reportedly heard voices, had checkered past

September 17, 2013 5:25 PM