>> once the defense rested, willie megs called his rebuttal witness, a clinical psychologist to revisit the essential issues. >> did mr. gary hilton know right from wrong? >> my opinion is, yes, he clearly knew right from wrong and clearly he knew the criminal nature of conduct. in my opinion, he is a psychopath. that's what generated the murders and nothing else. >> the attorneys made their final appeal to the jurors. >> i'm going to ask every one of you individually to go back in that jury room and vote to recommend that gary hilton be put to it death. >> on behalf of mr. hilton, i'm asking all of you collectively and individually to recommend a life sentence in this case. >> the jurors then retired to deliberate nothing less than whether gary hilton should live or die. coming up -- another haunting question --