Illinois has red flag laws, but the problem is most counties don't strictly enforce them. DuPage County is one of the few that actually does, but Highland Park is in Lake County (which borders Wisconsin to the north and Cook County to the south). That makes it more of a local issue, and I'm guessing most people in IL and everywhere else don't know who their County Board rep is. It would also land in the lap of the county sheriffs office as well.
The bare minimum here, be it Federal/State/County should be to tighten the laws that are already on the books as it relates to guns. I don't consider that big government or more government. It's common fricking sense and doing your job. Upholding law that is already supposed to be in place.