325 ILCS 5/4.1
Any person required to report under this Act who has reasonable cause to suspect that a child has died as a result of abuse or neglect shall also immediately report the person's suspicion to the appropriate medical examiner or coroner. Any other person who has reasonable cause to believe that a child has died as a result of abuse or neglect may report the person's suspicion to the appropriate medical examiner or coroner. The medical examiner or coroner shall investigate the report and communicate the medical examiner's or coroner's apparent gross findings, orally, immediately upon completion of the gross autopsy, but in all cases within 72 hours and within 21 days in writing, to the local law enforcement agency, the appropriate State's attorney, the Department and, if the institution making the report is a hospital, the hospital. The child protective investigator assigned to the death investigation shall have the right to require a copy of the completed autopsy report from the coroner or medical examiner.
325 ILCS 5/4.1