Completely ignoring any forensic evidence, let's look at the circumstantial evidence in this case, shall we?
Having watched numerous true crime stories on both A&E and Discovery for the past couple of years, I can tell you that it is always, always, ALWAYS the husband. Well, ok - in those shows there's about a 1% chance the wife ran into a random killer or fell off a cliff. However, given the other circumstances in this case, I'd say there's little doubt what the outcome will be. Quite frankly, I'm amazed this idiot is pleading not guilty, and that's probably what led to the falling out with Mr. Peterson and his private attorney.
Give it up buddy.