Prospect Heights police said its officers responded to the area of 79 East Palatine Frontage Road in Wheeling just after 9 a.m.
There, officers found the body of man on the ground along the fence.
He was identified as John Folan, 68 of Prospect Heights, according to the Cook County Medical Examiner.
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On Monday police confirmed they were investigating the case as a hit-and-run crash.
No one is in custody.
The Prospect Heights Police Department asked anyone with information to call them at 847-398-5511.