CHICAGO, IL - JULY 06:  An ambulance leaves a crime scene where seven people were shot on July 6, 2013 in Chicago, Illinois. Two days earlier and half of a block away Steve Mabins, 21, was shot and killed on his way to an Independence Day party. More than 60 people have been shot in Chicago since Wednesday, at least nine fatally. (Photo by Scott Olson/Getty Images)