In America, it’s estimated that 4% of people in prison are actually innocent—and an even smaller fraction are exonerated and walk free. Kerry Robinson is one of those people. The 4% explores the story of Kerry's wrongful conviction and the relentless pursuit of justice that led to his freedom after nearly two decades behind bars. In this four part series, we’ll hear the story of one man’s journey to exoneration: the system that failed him, the science that freed him, and the people who fought for his justice.