He seems like a cross between Scott Peterson and Ross Harris. And that's not a compliment.
Everyone said Ross was a such a good father. And people liked him a lot, thought he was a real nice guy.
Then his secret dark side was revealed. Lots of random hook ups, and sexting, and hookers and sex with a minor.
And much like CW, Ross initially garnered suspicion because he acted so odd after the tragic death of his child. Made small talk with the cop on the way to the station, acted calm during the interview.
Ross probably did not plan to kill the child, but simply, nude photos of an underage girl were of a higher priority than own kid strapped to the carseat in hot weather. It would be more like a teenager who forgets to feed his cat for days because he is busy playing computer games. He may even hear the cat meowing but in his mind, the game is of a higher priority. It represents extreme neglect of an obsessed person.
CW and Scott Peterson are very much alike. I sometimes read about owners leaving their pets in the forests, or on the road, when their circumstances change and keeping an animal becomes more expensive or time-consuming. This is not unlike CW. The pattern of thinking is probably like "I thought it would be fun - but it is time-consuming and also expensive - if she died, if they all died, there would be no problem - so why shouldn't they die?" Something is amiss here, but I do not believe such people are psychotic, because essentially, they keep in touch with the reality, except for believing that they will get away with crime. They merely choose the way of physically removing those whom they perceive as an obstacles over other avenues.
(But perhaps this is what distinguishes "criminal mind" from a non-criminal one? Because the moment a person starts thinking, "OK, it is a burden, but here are my options, call my relatives and ask for help, call my friends...here are other avenues", they are on another path).
Someone mentioned the man who disappeared from everyone's life, escaped...traumatic as it might have been for his family, it was another path - removing himself from everyone's life.