No landlord can be effective at tenant screening without a thorough knowledge of Fair Housing laws. While we do not cover fair housing issues here, there are numerous Internet resources you can use to educate yourself. Here are a few:
U. S. Department of Housing and Urban Development
Americans With Disabilities Act
Illinois Fair Housing Initiative
National Fair Housing Advocate Online
It is very easy to run afoul of the law. Don't risk your investment - ignorance of the law is no excuse!