so they turned to the person closest to christopher, his fiancee, juliet driscoll. weeks. invitations were 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. >> i 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 under the direction of christopher. finally she started crying. and i go, i think i might have her. >> with the tears, came the story of what christopher had said to her that might just nail him for murder. >> parents deserve to die for taking years out of his life. she said this went on for years. she interjected, she said, i knew it was going to happen, i just didn't k