James Oh was 76 and the long-time owner of Gold Corner Market in the 16th Street Heights neighborhood when he was attacked during an armed robbery on July 4, 2014. Two masked men entered the store about 5:20 p.m.; at least one carried a handgun. They demanded cash, struck Mr. Oh’s wife when she had trouble opening the register, and took about $3,000. Mr. Oh handed over the money but was then beaten and struck in the head with a weapon. He died of his injuries at a hospital four days later, on July 8, 2014.

The Metropolitan Police released surveillance images of the two suspects, described as Black males in hooded sweatshirts, and a $25,000 reward was offered. A stolen black Jeep used to flee the scene was later recovered. No public announcement of arrests has been made and the case remains unsolved. Anyone who knew Mr. Oh or has information that could help identify the two men is asked to come forward.