Errol Morris got a man to basically confess to a murder on tape

That's pretty impressive without the usual cop tricks at your disposal

amazing movie

"In light of the new evidence uncovered by the film, an evidentiary hearing was held. David Harris testified, recanting his earlier testimony against Randall Adams. "Randall Adams knew nothing about this offense and was not in the car at the time," Harris testified. Adams' capital murder verdict was overturned, and he was released from prison in March 1989. Adams then filed suit against filmmaker Errol Morris over the rights to his life. "