Devin J. Smith, 31, was shot and killed outside a business in Chicago’s South Loop on the night of September 5, 2025, near the 1300 block of South Michigan Avenue. Police say an argument between Smith and a 32-year-old employee turned physical shortly after 9:28 p.m., and paramedics pronounced Smith dead at the scene from a gunshot wound to the head.

Prosecutors later described a charging narrative at a detention hearing: the employee, identified as Souleymane Diallo, 33, was working as a security guard and the dispute started inside a smoke shop over an attempted trade of cannabis for a rolling tray. The guard allegedly argued with Smith on the sidewalk for more than ten minutes, went back inside declaring an intent to fight, then returned, and after a scuffle fell, got up, drew a pistol, chased Smith, and shot him in the face as Smith backed away. Surveillance video cited in court is said to show the guard racking the slide before firing and placing a gun in the victim’s hand to stage a struggle.

Did anyone in the South Loop area witness the argument or the moments before the shooting?