Was The "Green Beret Killer" Wrongly Convicted?

You may know Errol Morris as an award winning documentarian, but he's also an author.  In A Wilderness of Error: The Trials of Jeffrey MacDonald,  Morris investigates the case of the notorious "Green Beret Killer" convicted 30 years ago of murdering his family.  Over the years, MacDonald has maintained his innocence and has insisted that his loved ones were slaughtered by four hippies.  After two decades of investigation, Morris concludes many of the things we think we know about the case are flawed and that MacDonald may in fact be innocent.  Not just an exploration of the case, A Wilderness of Error poses hard questions about the nature of proof, the media, and our whole criminal justice system.