About Us Campion, Curran, Lamb & Cunabaugh, P.C. is the oldest law firm in McHenry County, IL. Our Crystal Lake attorneys service clients that are looking for a lawyer to represent them in the areas of family law, bankruptcy law, corporate law, real estate law and more. We will work with you and your situation to help you seek justice and make sure that you are represented properly whether in court, outside of court or in daily business procedures.