Mitchell S. Sexner & Associates LLC Chicago Criminal Defense Law Firm Mitchell S. Sexner & Associates LLC is a Chicago criminal defense law firm who has represented over 20,000 clients since 1990. We handle a number of case types including DUI defense, drug crimes, sex crimes and many others. No matter what you have been accused of, we consider it an honor to advocate on your behalf and we will work tirelessly towards the successful result that you desire.