Here are some articles to get you started. https://www.aclu.org/blog/privacy-technology/surveillance-technologies/eight-problems-police-threat-scores https://w

Here are some articles to get you started. https://www.aclu.org/blog/privacy-technology/surveillance-technologies/eight-problems-police-threat-scores https://www.aclu.org/blog/privacy-technology/surveillance-te... https://www.telegraph.co.uk/news/worldnews/northamerica/12093445/US-police-departments-calculate-threat-scores-for-residents-based-on-arrest-records-social-media-posts.html https://www.telegraph.co.uk/news/worldnews/northamerica/1209... https://www.washingtonpost.com/local/public-safety/the-new-way-police-are-surveilling-you-calculating-your-threat-score/2016/01/10/e42bccac-8e15-11e5-baf4-bdf37355da0c_story.html?noredirect=on&utm_term=.c0f6ea0ecd42 https://www.washingtonpost.com/local/public-safety/the-new-w... National data from intelligence agencies are provided to municipal police through "fusion centers". Different cities provide their own data into these centers (e.g. Seattle recently built and tore down a city-wide camera surveillance system) which are consumed in the other direction. Threat scoring software use various data feeds including those from social media platforms.