How Police Body Cameras Were Designed to Get Cops Off the Hook

In the wake of protests over police violence against black men, many civil rights activists are calling for a high-tech solution: strapping wearable body cameras to cops. The idea is to hold police accountable for unnecessary violence. But the history of police body cams reveals that the devices have often had the… » 3/16/15 2:15pm 3/16/15 2:15pm