I'm not a professional, but I see Scott Peterson as being a sociopath/psychopath. He's never confessed and he put his wife's family through unbelievable hell with his many lies. They had to wait for four months before her body and the baby's body washed up in San Francisco Bay before they knew, for sure, that they had been murdered.
With CW, he tried to hide his heartless and hideous crime, and he gave bizarro interviews after to try to make people believe he had no idea what happened to his family. But unlike Scott Peterson, CW caved rather quickly. Is this a sign of genuine remorse and conscience, or did he cave because he was presented by LE with proof that he killed them and hid their bodies and he had no choice but to admit it?
I really don't know at this point.