That is the problem with this case. What you said, your question. "PROVE HE'S NOT GUILTY". That, I believe, is the way that you approached this whole case, the way a majority of the public and all of the media viewed this case, and the way the Judge and Jury dealt with this case.
This is not how our JUSTICE system is supposed to operate, and that is what I am at odds with.
And it is the JURY'S opinion that he's going to fry.
The difference is, unlike you and me, the jury heard ALL the evidence. Twelve unique individuals, each with his or her prejudices and predilections.
And in the end, they said that he's guilty. What's more, he's SO guilty in their minds that he's going to die. This by a jury in a state that hands out the death penalty like Hillary! Rodham Clinton hands out tips: Very, very sparingly.
Now we discover, from interviews with the people involved, that Westerfield was going to confess until the state authorities--unfortunately for him--found the body first.
Your man is guilty, he was ALWAYS guilty, and he's now guilty beyond even a WHISKER of a doubt thanks to what we've now learned.
I'm sorry you take things like this so personally that you are unable to accept facts when they fly in the face of your purely emotion-based agenda.
But that's just tough.