Authorities are starting to use computerprograms running algorithms to establish crime maps, and even predict wherecrimes could happen. How Tom Cruise of them. On program called PredPol predicts crime in real-time and has already reduced crime rates in London. Using algorithms, it creates a heat map of where and when crimes will happen, creating a “predictive area” of a specific set of streets, which allows police to attend to the higher-risk areas. So essentially it puts police in the right place and right time to stop crime.