Is Scott Peterson Innocent?

From Wikipedia:

On January 17, 2003, it became known that Scott had engaged in two other extramarital affairs prior to an affair with a woman named Amber Frey. Frey informed police of their relationship on December 30, 2002, shortly after discovering he was a person of interest in Laci's disappearance. She told detectives that she met Scott on November 20, and that he had initially told her he was single. She also informed police that on December 9, two weeks before Laci's disappearance, Scott had told her that he was a widower and it would be the first Christmas without his wife.

Loose lips sink ships?
 
Fishing, sleeping, alibi from grandma, basically worth nothing.

If you watched Inside World's Toughest Prisons, host Raphael Rowe kept saying he went to prison for a crime he did not commit, but wikipedia states he obviously had victims' properties on him and how does he explain that?
 
I always got the impression he was guilty as hell and killed his wife because if he got divorced and had to start paying child support, that would have ruined the "playboy" lifestyle he had created for himself.