Oakland Police Department officer Huy Nguyen wears Portable Digital Recording Device, as he patrols business...
Oakland Police Department officer Huy Nguyen wears his Portable Digital Recording Device, a body camera, designed to record both audio and video in the field, as he patrols the business district in Oakland, California April 14, 2015. OPD was one of the first large organizations in the country to utilize the device, which documents officers actions and community interactions with police. REUTERS/Robert Galbraith