I don't know much about the Chicago incident. But in the instances of the other two Illinois cougars, they were found in fairly rural and remote portions of the state. Don't recall that there were ever any coinciding confirmed sightings, game camera pictures (even though one was found dead during deer season), tracks, feces, kill sites, etc. in those exact areas. Rather you had pretty much the same sort of unconfirmed reports that we are hearing from Ohio and PA. Most people, including myself, laughed at those reports in Illinois until one day a dead one pretty much just appeared out of nowhere. So, now I keep an open mind.