FWIW, East St. Louis (of Vacation fame) is in Illinois.
When the University of Minnesota (my alma mater) won back to back national championships in hockey (’02 and ‘03), a large number of students gathered and torched dumpsters, tipped over cars, broke windows and even threw stuff at the police.
The police, of course, weren’t amused and responded with tear gas and also shot pepper ball pellets at them.