From the Brennan Center for Justice:
Social media monitoring products are becoming an increasingly popular tool among local governments and police. Social media monitoring technology provides the capability to constantly monitor and archive information on millions of people’s activities, and can be used by law enforcement to probe posts on sites such as Facebook, Twitter, Instagram, and YouTube for information on protests, potential threats, breaking news, and more. This map depicts cities, counties, and law enforcement agencies across the United States that have spent at least $10,000 on social media monitoring software, according to public reports and information from the government procurement database SmartProcure.
Access the map and get more details on procurement by cities, etc., here.
h/t, Joe Cadillic