The shooting was reported around 9:35 p.m. in the 3900 block of South Capitol Street near a 7-Eleven store. No suspects or motives have been identified.
Metropolitan Police officials say at the scene they found two men who had been shot.
Both were taken to area hospitals, where one of the victims was later pronounced dead.
That victim was later identified by investigators as Anthony Richardson, 23, of Southeast, D.C.
Police say they are also investigating a separate double shooting in northwest D.C. that happened early Thursday morning.
Officers responded to a shooting in the 2000 block of 14th Street around 12:10 a.m. where they found two men suffering from gunshot wounds. A vehicle was also struck by gunfire.
Both shootings remain under investigation.
Anyone with information is asked to call 202-727-9099 or send a text tip to 50411.