About Us Working through a family law dispute can be hard on your household. With the right legal representation, you can protect your family throughout the process. The Law Office Of Clare McMahon LLC is a family law firm based in Glenview, Illinois that serves Chicago, Illinois and the surrounding suburbs. Attorney McMahon wants to help you move through the legal system as easily as possible. She will represent you in court, mediate conversations between you and your partner and go over your parental rights with you.