Abstract: Techniques for monitoring individuals, including: a peer device to obtain, from a watchlist data source, first watchlist data concerning a first set of individuals of interest, the first watchlist data including biometric characteristics for the first set of individuals of interest; obtain, by way of a biometric sensor of the peer device, first biometric data for a first individual; determine, based on comparison of the first biometric data to the biometric characteristics, a first threat level for the first individual; generate, a first access control data entry for the first individual, the first access control data entry including an indication of the first biometric data; send, to other of the peer devices by way of peer-to-peer synchronization, first access control data including the first access control data entry; send, to an access control system, the first access control data entry.