rosenfield, devastated, drove to the prison to tell robert. >> robert and i hugged. we cried. and probably it is about the most painful part of this process. >> robert's only door to freedom slammed shut. but half a world away, someone else was watching robert's case. could his opinion make a difference? >> coming up -- >> isn't a confession the strongest evidence you can get? >> not always. >> the police detective in robert's corner. when "dateline: extra" continues.