There have been numerous unconfirmed cougar sightings in the northern Chicago suburbs recently. This happens every couple of years. Last time (2008) the police shot and killed the animal. I hope this one stays clear of humans. There's never been an instance of a cougar attacking a human in Illinois so I wish they'd just leave the animal alone. A least, if they don't want them roaming about residential areas, they should tranquilize it and relocate it back to the mountains rather than kill it.Full story.