I believe that HBO is currently showing this documentary. It comes out on DVD in October, and you can check the following link to see if it's playing at a theater near you: http://www.breakthrufilms.org/trials/screenings.html

The Trials of Darryl Hunt
Grade: A

Co-directors Anne Sundberg and Ricki Stern earned an Independent Spirit Award nomination for this fascinating and infuriating documentary about racism in the North Carolina justice system. In 1984, a jury wrongly convicted a young black man named Darryl Hunt for the rape and murder of a white woman. Despite a dearth of conclusive evidence against him, he spent 20 years in prison before the court finally exonerated him. Sundberg and Stern strike a perfect balance of interview, courtroom and TV news footage. This is hard-nosed reporting, but be sure to keep some Kleenex handy for the cathartic conclusion.