NYPD · NYC.gov
The NYPD disclosure from February 4th:
The NYPD uses internet attribution management infrastructure, including Ntrepid, to manage digital footprints and allow its personnel to safely, securely, and covertly conduct investigations and detect possible criminal activity on the internet.
. . .
The information that is ultimately accessible to NYPD personnel utilizing this equipment is limited to publicly available information or the information that is viewable as a result of the privacy settings, privacy practices, and access limitations of an internet environment (e.g., chatrooms, social media profiles, messaging applications)