lisa jennings was dead. the question for the detectives was, did she take her own life, or was this murder? here is keith morrison with, a crack in everything. >> it was his secret that started it. a secret gift. it was christmas eve in the year 2006. a little farm not far from a little town called buffalo, buffalo man, missouri. and on that farm a fine new house, brad and lisa jennings had made for their families. the stockings were hung. children were snug in their beds. and lisa was sitting up very late, drinking wine and crying. -- well, who knew. but for one thing, with lisa in the way, brad couldn't sneak that secret of his into her stocking. which is what started the argument of slamming doors and said it in silence. before amanda woke up to the sound of her dad on 9-1-1. >> and he's very hysterical. you know? he's crying, can't really say anything other than, get here quick. get your quick. i heard that two or three times. >> such a complicated tale. with its secrets, lies, shifting loyalties. and he