get a bowl of ice cream, and before we knew it, the bowl of ice cream went flying, hemy was getting slapped, and it just kept going and going and going. >> but it was at boarding school that hemy had experienced his first delusion, this defense expert testified, a demon. >> he described the demon as much bigger than him. he said that when he felt and saw this demon, he felt anguish. deep pain. >> by the time andrea met him, hemy neuman had a history of breakdowns. and he was teetering on the edge of having another one, according to his defense. hemy's fascination with andrea began as a fantasy, according to mental health experts, something to help him escape his troubled life. but they say that workplace infatuation soon became something much darker. hemy's confidant said that it looked like andrea would wind