geofencing

Police use surveillance software, which uses mobile technology and social media to keep tabs on citizens.
NEW YORK— It is run out of a quiet, unassuming office on a tree-lined avenue in Bethesda, Maryland.  The rows of hip restaurants are offering young urban professionals all the grande-iced-sugar-free-vanilla-soy-lattes they could ever need. However, this serene suburban idyll belies the fact that serious work for the police state is taking place out of view.