two pills tested positive for barium carbon ate, a toxic chemical used in the production of glass.nancy never directly accused richard of poisoning her. >> nobody wants to believe that they are married to somebody who can murder because then what are you saying about yourself? >> and it's kind of outside the realm of most people's reality. i don't think she wanted to believe it. i think she was embarrassed or ashamed to say anything about it. >> prosecutors believe the motive was money and the desire to live with his girlfriend. >> he didn't want her. he wanted the family affiliations. it was partly money and partly just the position that he wanted and he couldn't have either one with just the divorce. >> prosecutors believe richard first tried to kill nancy by putting barium carbonate in her vitamin pills and may have put it in nancy's soda at the movies. when that didn't work he used arsonic. forensic testing showed nancy started ingesting arsonic in september around the time she and richard reconciled. the fatal dose was administered two days before nancy was admitted to the hos