PREVIEW: The People vs. O.J. Simpson: What the Jury Never Heard

O.J. Simpson Prosecutor Marcia Clark sits down for a revealing new interview with Josh Mankewicz where she opens up about the case that is still making headlines more than 20 years later. This two-hour special, an update to Dateline’s 2014 report, also features interviews with key players and witnesses from the trial. Airs Sunday March 6 at 9/8c.