Sep 17 2013
Authorities believe there was only a lone gunman responsible for the Navy Yard shooting rampage that left 13 people dead.
Police had earlier said they were searching for a possible second suspect.
Mayor Vincent Gray says the 12 shooting victims range in age from 46 to 73 years old. The gunman, identified as 34-year-old Aaron Alexis, was also killed.
Mayor Gray said at a news conference they are still notifying the families of about half of the 12 people who were killed.
The FBI says the gunman used a valid pass to get on to the Navy Yard.