Authorities are comfortable they have the "single and sole" person responsible for Monday's shooting that left 12 dead and 14 injured, D.C. Police Chief Cathy Lanier announced in a press conference Monday night.
The suspected shooter, 34-year-old Aaron Alexis of Fort Worth, Texas, was killed in a shootout with police earlier today. The ages of the deceased range from 46 to 73 years of age, DC Mayor Vincent Gray said. One of the victims was a D.C. resident. Seven families of the deceased have been notified, he said, while the other six are still being notified.
The Federal Bureau of Investigation confirmed that Alexis had "legitimate access" to the Navy Yard complex due to his work as a private contractor and possession of a valid pass. No motive as to the shooting has been established yet, authorities say.
Police are still searching for a second person, however, an African-American male about 50 years old wearing an olive drab military-style uniform with graying sideburns. But authorities have not said what, if any, role the man may have played in the shooting.
Authorities identified 7 of 12 shooting victims killed. None of the dead were military personnel.
NBC's Kasie Hunt has the names: