In the robbery case, a man borrowed a cell phone at the 7-Eleven on Broadway and Barry to call for help at 4:30AM. The victim said two black male attackers blasted him in the face with bug spray, robbed him, then fled on foot. The caller was "too shook up" to offer a further description of the offenders. The incident reportedly took place a few blocks north of the call location, at Broadway and Aldine.
When police arrived at Broadway and Barry, the victim was gone, but the man whose phone he borrowed was still there. Officers could not file a report since the victim was gone.
UPDATE 6 AUGUST 2013: There is no record of the "bug spray" robbery being recorded with Chicago Police. A reader who "may be" a police officer stated that the bug spray victim was also the 4:06AM gun point robbery victim written about on CWB. There is a conflict in the timing that the reader states may be the result of a delay in dispatching the call to officers.
About 15 minutes after the previous call, a man dialed 911 from Halsted and Waveland to report that he had been punched in the face by "people." The victim was unable to offer any description of the people to call takers. Police arrived quickly but they could not locate the caller
That's because the caller had moved north, to Halsted and Grace. He called 911 again from his new location at 4:51AM. Officers went there and could not find the victim.
That's because he wandered off to try to find the people who punched him. He called 911 again, from Halsted and Waveland again, to say that he could see the police car and he would go talk to them.
There is no indication that any report was taken.