There is a separate department within the NYPD, the Social Media Analysis Research Team (SMART), which “analyzes social media for chatter, videos and relative information in regards to active investigations.” And department officials have said in the past that once the FIS generates a match, an “investigator proceeds with further research, including an examination of social media and other open-source images,” as then-NYPD commissioner James O’Neill wrote in The New York Times last year.
Article source: https://www.huffpost.com/entry/nypd-facial-recognition-facebook-social-media_n_5e46da8bc5b64433c615d9a1