Christopher Walker, 19, was shot once in the head outside his home on Silhouette Court on March 12.
Police called the shooting random, saying that Walker scuffled with the suspect, who demanded cash and jewelry.
Authorities are seeking to identify three men captured in surveillance footage at a Taco Bell.
Anyone with information on the case is urged to call CrimeStoppers at 404-577-8477. A $5,000 reward is being offered for information leading to the arrest and indictment of those responsible for the shooting.