4 Killed, 10 Others Wounded in D.C. Navy Yard Shooting

POSTED: 05:00 PM PDT Sep 15, 2013    UPDATED: 08:30 AM PDT Sep 16, 2013 
6 Killed, 10 Others Wounded in D.C. Navy Yard Shooting

Two officials say police are looking into the possibility of a second shooter at the Washington Navy Yard where several people were killed.