todd caldwell: she was just the-- the life of the party. tracy caldwell: once she started talking, she hadnt shut up. dennis murphy (voiceover): theyre divorced now. but tracy and todd caldwell watched their girl grow up all but unstoppable. a vivacious, winning teen. : bowling, todd, were not just talking recreational saturday night now and then? todd caldwell: no, were talking about a state champion bowler. anything she did, she had to be the best at it. (home recording): lisa look over here. dennis murphy (voiceover): lisa was a teenager when her parents divorced. todd remained an active father to lisa and his three other children. all the while, he was working a stressful and dangerous job as a deputy in the wapello county sheriffs department. he found comfort in several ways. one was his occasional hobby. hed take out his sketch pad from time to time. and then he met and fell hard for a nurse named amy. before long, he was starting fatherhood all over again--with twin daughters. this time, he was getting lots of help from lisa. she was

todd caldwell (recording): go get him. go get him.murder, brian tate had been targeted as a suspect and he had been exploited by seth's defense ever since. >> the question you have to consider whether or not the state has proven that seth techel did it. >> new defense attorneys had a completely different strategy. they barely mentioned tate's name. rachel offered a motive in earlier trials was also minimized this time. in cross examination, rachel was on the stand for seven minutes. there was the message on thursday. mr. and misses resuscitate her. blue skies ahead. we are a couple. what do you do with that? >> i tried to be as straightforward as i could with the jury. who would murder their wife to facilitate a relationship that hasn't even turned sexual. >> you are not having sex with this man? >> right. >> the only time you've seen them in person outside of work is four or five times? >> correct. >> you want the jury to think, you're going to shoot your wife for this? >> the attorneys then went on the attack. characterizing the wor