Predictive policing predicts police harassment, not crime

In Chicago, the "Heat List" system is used to direct policing resources, based on data-mining of social media to identify potential gang-members; the model tells the cops where to go and who to arrest, and is supposed to reduce both violent crime and the likelihood that suspects themselves will be killed -- but peer-reviewed analysis (Scihub mirror) of the program shows that while being on the Heat List increases your chances of being harassed and arrested by Chicago PD, it does not improve crime rates. (more")