One of the newest policing tools is called PredPol. It's a software program that uses big data to predict where crime is most likely to happen, down to the exact block. Dozens of police departments around the country are already using PredPol, and officers say it helps reduce crime by up to 30%. But some skeptics are worried that despite its futuristic promise, PredPol and similar tools might inflame relationships between local police departments and communities of color. | Real Future