marcia clark, she cross-examined a world renowned expert, a psychiatric expert, dr.spective patient is asked whether or not he hears voices, he may well adopt the suggestion and agree that he does, when in fact he does not. that can happen, can it not? >> it can happen, yes. >> so the fact that the defendant may have wanted to kill rebecca schaeffer if she was arrogant or because he felt she rejected him is not in itself evidence of a mental disorder or defect, is it? >> no, that isn't. >> i must say by the time dr. dietz got off the stand, i think even his knees were rattling a little bit. >> i grabbed the door, gun still in the bag, reached around, grabbed it on the trig, like this. phew. pow. >> his demeanor during those interviews was matter of fact. he shows no remorse, and there's not any sense that he saw anything wrong with what he had done. >> bullet hit her here. she was just screaming. "why? why?" she was screaming. she was just straight screaming. "why? why?" >> i watched it a few times thinking, "wait, there's something here." and i watched it again, and