NEW YORK, NY – DECEMBER 03: New York Police Department (NYPD) Officer Joshua Jones demonstrates how to use and operate a body camera during a press conference on December 3, 2014 in New York City. The NYPD is beginning a trial exploring the use of body cameras; starting Friday NYPD officers in three different precincts will begin wearing body cameras during their patrols. (Photo by Andrew Burton/Getty Images)