I see interviewing CW like going up to a huge pinball game. You pull the lever and the ball bounces around differently each time. Now that everyone knows he simply lies all the time, I see the massive problems in trying to find out what really happened, ie for the interrogators. Too bad they can't hook him up to a lie detector every time they speak with him.
I think it's hard to fake the way his voice cracks when he discusses the horrible parts of his story. But, even though his voice is cracking, he may actually be telling another lie under that stress.
ETA: Because of his major inconsistencies and those of his lover, conspiracy theories will continue on. That's what happened with Natalee Holloway, online chat boards were there for years discussing bizarro theories, meanwhile Aruba businesses offered Holloway tours and so forth.
But we have enough, imo, to know he murdered them all in cold blood. Just that he will never ever own up to exactly how he did it, what he was thinking, etc. He was THERE, but his roadmap is to claim someone else was in his body doing it, controlling everything. That leaves him off the hook (in his own mind, and that of his family, and on the k-type apologist sites). He will remain an enigma to those of us who pay attention, but a stone cold murderer to the rest of the globe.