>> yes, well, i usedo be utah but not criminal. >> reporter: david schwimmer transforms into simpson's close friend robert kardashian. >> why in the hell were you in there alone? >> i don't know, man! >> at that point, nobody really knew much aboutobert kardashian. he's just a regular man who suddenly foundndhimself, one year later, incredibly famous. >> reporter: uncomfortable with notoriety, kardashian never lived to see t explosive fame his daughters and ex-wife would later enjoy. schwimmer says he spoke with kris jenner, learning things few of us kne about o.j.'s confidant. >> incredibly loyal a compassionate and generous. to me was learning that he was a man of deep faith. very religious man. i do think he was conflicted at times. and i think his feelings and beliefs did change in the course of the trial. >> reporter: in a documentary "theheecret tapes of the o.j. case," kris jenner recalls watching her ex-husband's face as the verdict was announced. >> i think h hwas shocked. he was definitely stunned. i mean, you could look at his face and see it, knowing him my sbif liar entire