>> but investigators were getting a good look at christie's body and saw wounds that to them suggested a struggle and more than one nasty blow to the head. so the police had to choose. which version, chris hall's or lindsay patterson's, was more likely the true story of what happened? tom dove is a senior investigator for the riverside d.a. >> i think they felt this was enough to say this was not an accidental drowning. it was purely much more suspicious than that. >> and so before the night was over, chris hall was arrested and charged with the murder of his wife. the girls could stop waiting. he wasn't coming home. >> it was obviously a tragedy, losing our mother that day. but this is a tragedy on top of a tragedy now. >> because knowing our parents, it's the farthest thing from truth. >> and one that felt infected by