The cost of hiring an experienced criminal defense lawyer in Chicago can vary widely depending on the complexity of the case, the attorney's experience and reputation, and the amount of time and effort required to mount a strong defense. Some criminal defense attorneys charge a flat fee, while others charge by the hour. It's important to discuss fees and payment arrangements with your attorney before hiring them to ensure that you are comfortable with the costs and that there are no surprises down the road. It’s also always important to make sure that the attorney you hire has a written contract setting out these fees, and that you receive a copy of it for your records.