On the morning of July 13, 2015, a dispute at an Exxon Food Mart at Memorial Drive and Covington Highway in Decatur, Georgia, left 54-year-old Harry Wells dead. Wells, a part-time pastor and father of six, was working as a clerk at the store at about 4 a.m. when police say an argument broke out between him and another man. Surveillance footage reportedly captured the verbal exchange before the other man shot Wells through a window. He was taken to Grady Memorial Hospital and died of his injuries.

DeKalb County police later identified and arrested 24-year-old Rickey Westbrook, who was charged with Wells’s murder. Authorities said surveillance video was key evidence and that they believed an argument preceded the shooting; they did not publicly detail what the dispute was about.

Did anyone see Wells working that morning or know what might have sparked the confrontation?