Really??? What law was broken, do you have a link? Since IL is an at-will employment state he can pretty much be fired for anything.
Just fyi...Can an employer terminate me without advance notice or without giving a reason or an unfair reason for the termination?
Yes. Illinois is an "employment at-will" state, meaning that an employer or employee may terminate the relationship at any time, without any reason or cause. The employer, however, cannot discriminate based on race, color, religion, sex, national origin, ancestry, citizenship status, age, marital status, physical or mental handicap, military service or unfavorable military discharge. If you wish to locate additional information on the Illinois Department of Human Rights,
From the IL dept of labor website