It seems like Chris had to think of a reason that would justify his killing Shanann, so he made up a story so horrible that he may have thought would bring either doubt or even a lesser charge of justifiable homicide. It is like him saying, well, she killed the kids, and then I killed her, so we are even. The only problem is that this theory is so outrageous and also pretty close to one of the dumbest things I ever heard, I wonder how much time he spent on it. I hope not, a lot, because it fails to make much sense. To blame a person, who is no longer able to defend themselves because you killed them, is almost like killing them again. JMO