A newly unsealed court filing in a proposed class action alleges DHS used a Palantir-built database to track ICE observers, including their photos, license plates, and home addresses. One agent allegedly used facial recognition and LexisNexis searches to identify observers and warned one woman she could be added to a 'domestic terrorism watchlist.' The case stems from 'Operation Catch of the Day,' an immigration enforcement surge in Maine, and was brought by four observers in federal court.