At 10:20 p.m. Saturday, a 17-year-old boy was killed and a 19-year-old man was wounded in Back of the Yards. They were in the 5200 block of South Sangamon Street when someone in a nearby silver Audi fired shots. The 17-year-old was shot in the back and went to Stroger Hospital, where he was later pronounced dead. The 19-year-old was shot in the arm and also taken to Stroger Hospital. His condition was stabilized.