Predictive policing is a technology developed by tech companies and marketed to police departments aimed at forecasting crime. In known cases it has been used in several US states, in China, and in several European countries. Predictive policing systems process past crime data through prediction algorithms to identify potential crime “hotspots.” Predictive policing has been roundly criticized for the opacity and racial bias of its algorithms; for its tendency to repeat existing biases within police forces; its non-disclosed rollout in some police departments; and its ineffectiveness as a tool of community outreach or crime prevention (see Feminist Data Manifest-No, Coded Bias).