something's definitely odd, but the authorities have said this guy possesses info only thew killer would know, then there should at least be a way to track that info from this guy back to the killer, who would have shared such info with him.
Karr's ex-wife thinks he is creepy. She was interviewed by a San Jose paper earlier. She has no reason, on the surface, to lie. And yet she claims he was in Alabama with her for Christmas when the murder occurred. His presence in Alabama can easily be corroborated, one way or the other.
I'll say. Especially the ransom note in Patsy's handwriting.
The problem with a 10 year old case like this is what exactly is there that "only the killer" could know. For one thing they really mean "only the killer and the cops" because if the cops didn't know it then how can they know it's true when the confessed killer says it. For another lots and lots of cops have been on this case for various lengths of time and at least some of them (by pure statistical reality of how people are) have blabbed something they probably shouldn't have. I certainly hope that he's the guy and they've got enough evidence and he fries, but the whole Alabama thing makes me think it's probably none of the above.