A short article and no links that explain more alas:
Police departments in many American cities are using high-tech databases to determine how dangerous individuals might be when officers arrive at a crime scene.The systems take into account criminal history, social media profiles, property records and other factors to produce a “threat score”. Before reporting to a crime scene, police can use the databases to retrieve scores on those inside.
Link:http://www.telegraph.co.uk/news/worl...dia-posts.html