If a person who signs the death certificate, a district attorney general or any law enforcement officer, or an emergency medical or rescue worker, emergency medical technician or paramedic who attended the person immediately prior to or after the person's death, signs a written statement requesting the delay of a cremation based upon a reasonable belief that the cause of death may have been due to other than accidental or natural causes, then the cremation of a dead human body shall be delayed based upon that request.