Five more people were killed and seven others, including the 3-year-old boy, were wounded from Sunday afternoon to early Monday. One of the fatalities Sunday was a 21-year-old man shot with “possibly an AK-47’’ assault rifle in the Back of the Yards neighborhood, according to police. Police intially said the victim was 17. The 21-year-old, who the Cook County medical examiner's office said was Salvador Suarez, was walking east in the 1700 block of West 46th Street around 1:30 p.m. when a light-colored, four-door Saturn pulled up and fired shots with a "high-powered semi-automatic weapon," striking the victim as he attempted to run, said Eugene Roy, chief of detectives for the Chicago police.