5 ILCS 815/10: Investigation of officer-involved criminal assault; requirements.

(a) Each law enforcement agency shall have a written policy regarding the investigation of officer-involved criminal sexual assault that involves a law enforcement officer employed by that law enforcement agency.

(b) Each officer-involved criminal sexual assault investigation shall be conducted by at least 2 investigators or an entity comprised of at least 2 investigators, one of whom shall be the lead investigator. The investigators shall have completed a specialized sexual assault and sexual abuse investigation training program approved by the Illinois Law Enforcement Training Standards Board or similar training approved by the Illinois State Police. No investigator involved in the investigation may be employed by the law enforcement agency that employs the officer involved in the officer-involved criminal sexual assault, unless the investigator is employed by the Illinois State Police or a municipality with a population over 1,000,000 and is not assigned to the same division or unit as the officer involved in the criminal sexual assault.

(c) Upon receipt of an allegation or complaint of an officer-involved criminal sexual assault, a municipality with a population over 1,000,000 shall promptly notify an independent agency, created by ordinance of the municipality, tasked with investigating incidents of police misconduct.