fiance, juliet driscoll. the two were engaged to be married in a few weeks. dress bought, invitations in the mail. >> she said, i don't know anything about it. christopher doesn't tell me. >> didn't tell her anything or so she said? >> that was my reaction and i didn't buy it. >> guess not because he went on grilling this young woman for more than 12 hours. at the end of which the detective played to her heart. her relationship with susan and john sutton. >> i said, look, susan really cared about you. she basically thought of you as a daughter. this woman didn't deserve to die like this. john doesn't certainly deserve to be blind the rest of his life and i know for a fact garrett did this per the direction of christopher. finally she started crying. i go, i think i might have her. >> with the tears came a story, what christopher had said to her that just might nail him for