On the evening of May 16, 2019, 29-year-old Jamal Cox Simms was found lying in the street at the intersection of St. Marks Avenue and New York Avenue in Crown Heights, Brooklyn, after suffering a fatal gunshot wound to the head. Emergency responders arrived around 7:15 p.m., but he was already dead. The shooting occurred about a block from his home.

Initial reports say an argument preceded the shooting, though the exact nature of that dispute was not clear. Simms’s mother was at the scene that night. The investigation continued for several weeks, and on July 25, 2019, 23-year-old Steven Brown was arrested and charged with murder and two counts of criminal possession of a loaded firearm.

Was anyone in Crown Heights that evening aware of the argument or seen leaving the area around St. Marks and New York Avenue?