An internal affairs unit within a police department must follow constitutional guidelines as mandated by State and Federal courts. A written policy must explain what action will occur when a complaint is made against a member. When a complaint is made against a member of the Schaumburg Police Department, all information is immediately recorded on the report of inquiry form. This report is forwarded to the member's division commander and then to the administrative division commander. The department chooses one of three levels for the processing of an internal affairs investigation, depending on the possible punishment and whether administrative or criminal charges could be filed. Certain required forms are necessary for each level of action. Level one punishment could result in suspension of 5 days or less. Level two punishment could result in termination, and level three involves the filing of criminal charges against the member. Steps are specified according to level selected. For example, for level one the employee can be ordered to answer all questions concerning the allegation, and a written statement is taken. Refusal to comply could result in the additional charge of disobeying a direct order, and a polygraph examination can be ordered. Upon completion of an internal affairs investigation, a letter is mailed to the complainant by the police chief advising of case disposition. An investigation results in one of the following findings: unfounded, exonerated, not sustained, or sustained. Appropriate disciplinary action is recommended by the investigator in accordance with a written guide. All decisions are subject to review up to the U.S. Supreme Court. The article includes seven figures showing the forms used.