50 ILCS 725/3.9

The officer under investigation shall have the right to be represented by counsel of his or her choosing and may request counsel at any time before or during interrogation. When such request for counsel is made, no interrogation shall proceed until reasonable time and opportunity are provided the officer to obtain counsel.

If a collective bargaining agreement requires the presence of a representative of the collective bargaining unit during investigations, such representative shall be present during the interrogation, unless this requirement is waived by the officer being interrogated.