At the beginning of the episode, the radio call was for a battery at Erie & Dearborn. It actually took place at Erie & Franklin. While practically any downtown street could have been used to simulate Dearborn, this section of Franklin has the elevated tracks, while Dearborn does not have them.
When the spots of blood are found on the sidewalk (on the west side of Franklin, after Burgess and Lindsey cross Erie), you see a large blue umbrella with camera equipment under it. This is also a matter of continuity, because when the cameras are looking south on Franklin, from north of the intersection with Erie, this equipment is not seen. If it had been seen, it would have been next to the gold 2001 Ford Focus ZX3 that is parked.
When Burgess and Lindsey are running south, crossing Erie St., the camera shows two tent tops, one black and one blue, on the north side of Erie, just west (left) of the intersection with Franklin.