Supreme Court of Illinois April 1987 casesCentral Illinois Public Service Co. v. Pollution Control BoardSwisher v. DuffyUnited Airlines, Inc. v. City of ChicagoRuffiner v. Material Service Corp.People v. WilsonPeople v. EricksonBoyd v. Madison Mutual Insurance Co.Weaver v. Midwest Towing, Inc.Walker v. HardimanPeople v. ThomasPeople v. SilagyPeople v. JohnsonPeople v. CabreraIn re SegallMassa v. Dep't of Regis. EducKoss v. SlaterCatlett v. NovakPeople v. Shum