>> it was kind of like the white elephant in the do. none of us really want to talk about it. it -- the police weren't calling us. i felt as if nothing was getting done. >> so diana decided that she had enough. >> i actually called mom, and she actually called, the sheriff's department. >> i said, we have so many questions, and nothing is being answered. >> it wasn't just questions that kathy's family had, they also had suspicions about mark. because, they knew something. the way angler marriage was a disaster. they wanted police to know the problems went back years. >> kathy had told me, basically, mark had an affair. >> that couldn't have been easy for you sister. >> she could never forgive him for that. >> they managed to carry on, but over the years, kathy's family remembers severing tensions, that could erupt into open warfare. they say, mark thought kathy gain too much weight. she wouldn't clean the house. she's been huge amounts of