Donald Campbell, 55, of Seat Pleasant, Maryland, was shot and killed one Saturday evening in March 2014 at an automotive business in the 6500 block of Central Avenue in Seat Pleasant. Campbell was an acquaintance of an employee at the shop.

Prince George’s County police found Campbell with a gunshot wound and pronounced him dead at the scene. Officers spoke with 43-year-old employee Archie Singleton of Upper Marlboro, who was found in possession of a handgun and reportedly acknowledged involvement in the shooting. Singleton was taken into custody and later charged with second-degree murder. Police said the motive had not been released and their investigation was ongoing.

If anyone was at the business that evening or knows why Campbell and the employee were involved, please share information with investigators.