Moriba Salim Hylton had returned to his old neighborhood to celebrate his new teaching job when someone gunned him down.

Four years later, his sister is still waiting for answers about the death of her brother, a 27-year-old artist who had just signed on to work at a D.C. charter school.

"We really want to press the issue that there are people that we really feel know exactly who did it," Aneka Hylton-Donelson told The Washington Examiner last week.

On the night of Aug. 29, 2009, Hylton was waiting outside a friend's apartment on the 1300 block of Fifth St. NW. It just a block from where he grew up before he left to attend Virginia Commonwealth University. After graduating in 2006, he taught science at Potomac High School in Oxon Hill. He was excited to be teaching in D.C.

Outside the friend's apartment, someone started shooting. Hylton was struck in the upper body and died.

"He always felt like if he was there, he might be able to be a positive influence," Hylton-Donelson said.

She said she believes Hylton was caught in the middle of the shooting but not specifically targeted, and she is waiting for someone to speak up about what happened.

"If we don't have hope, we don't have anything, really," Hylton-Donelson said.

Hylton's family established a scholarship in his name for high school artists.

Anyone with information about the shooting is asked to call the police at 202-727-9099. Callers wishing to remain anonymous may call 888-919-CRIME (2746).