So there are some basic facts involving sexual harassment in Chicago. First, any act of sexual harassment in Chicago at work is covered by the Illinois Human Rights Act ("Act"). The Act allows an employee to file a complaint with the Illinois Department of Human Rights ("IDHR"). There is no filing fee for filing with the IDHR and the investigation is conducted by the department for free. Also the IDHR is mandated by law to complete their investigation within one-year by law. This allows for a pretty quick investigation. Having a lawyer can ensure that the right information gets to the investigator and that will help you be successful.
Chicago is also unique in that you can file with the Chicago Commission on Human Relations ("CCHR"). This gives you two different agencies that basically do the same function. I prefer the IDHR because of the one-year time period but you do have options. There are very strict time limits for filing so make sure you check with an employment lawyer for those. The damages that you can get are far ranging. Everything from your job back, if you lost it, to back pay, front pay, attorney fees and money for emotional distress.