Should We Beware of Other License Plate Surveillance Companies Besides Flock?

NPR reports: Police officers in cities across the U.S. are quick to extol the virtues of real-time crime centers as a game changer that helps them find missing children, monitor large events from the skies and scope out dangerous scenes before putting an officer in harm’s way. Hundreds of police departments have one of these central hubs, which have existed for years.