
Former Prosecutor & Judge with 40+ Years Combined Experience Defending Clients Throughout DuPage County.
At McMahon Law Offices, our experienced DuPage County criminal defense attorneys have successfully defended hundreds of criminal cases throughout Oak Brook, Wheaton, Naperville, and all of DuPage County.
We're not just another law firm. We're former insiders who know exactly how the system works against you - and how to beat it.
Mike McMahon spent years as a prosecutor building cases just like yours. He knows every strategy the state uses, every weakness they hide, and exactly what makes them fold.Judge Cary Pierce (Ret.) spent decades on the bench deciding criminal cases. He knows what arguments work with judges, what evidence matters most, and how to present your case for the best outcome.
Together, we've handled every type of criminal case imaginable. From minor traffic violations to serious felonies, we've seen it all - and won it all. Our unique perspective gives you advantages other attorneys simply can't provide.