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