Missing or unidentified persons; create procedures regarding investigation of.

HB 685 requires Mississippi law enforcement agencies to immediately report missing children and submit detailed information - including fingerprints, dental records, and DNA - to the National Missing and Unidentified Persons System (NMUPS). It mandates that the State Medical Examiner test DNA of unidentified human remains using forensic genealogy within 45 days and prohibits destroying remains (classifying it as a felony). The bill defines "unidentified human remains" and "unclaimed human remains" to clarify which cases must be handled by medical examiners. These provisions directly affect law enforcement agencies, medical examiners, and the process for identifying missing persons and unidentified remains.