(b) Upon the receipt of such a report, the medical examiner or coroner shall cause an investigation to be made and shall report the findings to the local law-enforcement agency, the local prosecuting attorney, the department's local adult protective services agency, and, if the institution making a report is a hospital, nursing home or other residential facility, to the administrator of the facility, the state and regional long-term care ombudsman and the office of health facility licensure and certification.