that fred mueller was not telling the truth. >> prosecutors weighed it all and made their decision. ld stand trial for murder again. >> i remember having a moment, thinking, i can't do this again. and my mom all this would be like, well you're gonna do it. i felt like she was saying you're going to be fine and it's gonna be good. >> your mom was kind of guiding you through -- >> yes. she was always, suck it up, you can do it. >> but the second trial would by no means to be a carbon copy of the first. with new attorneys and new witnesses, both sides hoped that this time they would see a different result. coming up -- the defense comes out swinging. >> what the prosecution asks you to believe is that fred mueller went from this, to a homicidal maniac within seconds. >> but then, a defense witness says something that might do fred more harm than good. >> fred is very successful. he could sell anything. >> would jurors think fred had sold everyone a lie about what happened to leslie? when dateline continues. and for those who do get it bad, it may be because they have a high-risk factor.

leslie and fred mueller. married for almost 27 years. >> they were always super affectionate. had just started dating. just all over each other. >> ooh. [laughs] >> these are the mueller's three children. amanda, the eldest. then him ariel and alex, the only boy. they were brought up in texas near the town san angelo. but for fun this family heading out to their second home in lake city, colorado. those photos of their parents were taken nearby. >> they both love the cabin and going up to colorado. >> it was so pretty. >> it was in a valley and you would look and see the postcard mountains. >> there was a river running right near there. >> their rockies getaway was a family place to relax and escape their busy lives back home. >> what was life like up at the cabin? >> we would usually go in the summer's. we would just hike together. horseback riding. hang out as a family. >> did you feel like there was a lot of family bonding? >> yes. definitely. we ended up having a lot of fun. board games, going out hiking. doing all these different activities together. >> in texas, leslie ha