Barry sure loved to sneak around. That scary story relayed by Sheila, seems to form a pattern, especially as far as the day of the murder goes (creeping around the house, when he claimed he was looking for a Turkey). He spied on her physically, but also tried to access her phone, and keep tabs on her when she was away from him. Also, it sounds completely in character for him to have been concerned about what Suzanne was telling others in regard to the state of their marriage, and using the girls as weapons (we also saw and example of this when Lauren recounted trying to interview Barry at his condo). Whether one believes he is a murderer or not, I don’t see how anyone can argue that he isn’t a terrible human being.