A Southeast Washington man has been charged with murder in a five-year-old District killing.

Police responded to the 2700 block of Robinson Pl. SE at about 11:50 p.m. on June 19, 2007. They found Kirk Hart, 28, of Southeast Washington suffering from gunshot wounds. Investigators said he was shot as he entered his apartment.

Emergency responders took Hart to a hospital, where he died, according to police.

On Thursday, detectives arrested William J. Douglas, 25, charging him with first-degree murder while armed, police said.

Investigators were able to match Douglas’ DNA to pieces of braided hair and other DNA evidence they found inside a black face mask recovered from the scene, according to documents filed with the court.

The documents state that Hart had apparently pulled the mask off of his assailant “during a struggle”.

Police also nterviewed an inmate in jail who said Douglas had said he shot Hart during a robbery, according to court papers. Douglas told the inmate he had to shoot because Hart pulled off his mask, the inmate told police, the records said.

This post has been updated.