Sean Michael McDonald, 29, of Robbins, Illinois, was shot and killed during a drug deal on August 8, 2016, in the 13500 block of South St. Louis Avenue. The shooting happened around 1 a.m.; a 27-year-old man from Chicago was also shot and survived with non-life-threatening injuries. McDonald was pronounced dead at a nearby hospital.

Investigators traced the case to TreDaniel Williams, a 20-year-old man from Minnesota. An arrest warrant was issued August 10 after authorities say Williams fled to Minnesota; the FBI Violent Crimes Task Force arrested him in Minneapolis on August 12. He was held in Hennepin County before being extradited to Cook County and charged with murder and attempted murder. A Cook County judge denied him bond at a Markham bond hearing; his next court appearance was scheduled for September 21.

Are there readers who knew Sean or who have information about the shooting scene on South St. Louis Avenue?