Why not? We have wolves in Will County too. I have pictures from one in my back yard back in 2009. By the time I got my .308 out and some shoes on (it was February and snowing) it was gone. Tracked it on foot all the way to Route 6 before I lost it in the woods.
My wife worked for a county agency with wildlife biologists ...
I used to occasionally hear ‘animal stories’
An animal found dead on Feb. 13 along a road north of Morris has been confirmed by DNA testing to be a wolf from what is known as the “Great Lakes Population” of gray wolves, the U.S. Fish and Wildlife Service has confirmed.
Mar 2, 2005 — A timber wolf found dead near a state park in Lake County last month, probably hit by a vehicle, is a hopeful sign for restoration of an almost extinct ... 18 at the side of Illinois Highway 83 near Chain O’ Lakes State Park
https://www.chicagotribune.com/news/ct-xpm-2005-03-02-0503020290-story.html