The commissioner of public safety or a designee shall file each notification of disappearance with the missing persons information clearinghouse under Alaska Stat. § 18.65.620, and shall notify the peace officer in the district where the disappearance occurred or in the nearest districts where there is a peace officer to make an investigation regarding the disappearance. If the circumstances give reasonable grounds for suspicion that a murder has been committed or that a person has met with foul play, the peace officer shall report all the facts to the district attorney in the peace officer’s district or the assistant district attorney living nearest the place where the peace officer resides. The district attorney or the assistant district attorney shall assist and advise the peace officer in the investigation.