Upon receiving a report of a person believed to be missing, the law enforcement agency shall conduct a preliminary investigation to determine whether the person is missing. If the person is determined to be missing, the agency shall immediately enter identifying and descriptive information about the person to the Alabama Center for Missing and Exploited Children (ACMEC) and to the National Crime Information Center (NCIC) through the Criminal Justice Information Center (CJIC). Law enforcement agencies having direct access to the CJIC and the NCIC computer shall enter and retrieve the data directly and shall cooperate in the entry and retrieval of data on behalf of law enforcement agencies which do not have direct access to the systems. Law enforcement agencies shall likewise report or enter data to ACMEC relating to unidentified deceased persons.