Missing children under the age of 21 must be entered into which database?

Missing children under the age of 21 must be entered into the National Crime Information Center (NCIC) database, which is maintained by the FBI. The NCIC is a centralized database that holds information related to various criminal activities, including missing persons. This system is essential for law enforcement agencies across the nation, as it allows for immediate access to critical data about individuals who are missing, including children.

Entering information into the NCIC enables law enforcement officers to search for missing children swiftly and effectively, as it facilitates interagency cooperation and communication. Since the NCIC is a national system, it ensures that information about missing individuals can be quickly disseminated across state lines, which is particularly crucial in cases of abductions or when children might have traveled far from their last known location.

Other options, while they may contain relevant information, do not serve the same primary role as the NCIC when it comes to tracking missing children.