Lots of good posts by all. Thanks. Lots to think about.
Roy - Until recently Mitchell was held in a mental hospital, convicted of no crime, and no legal basis to compel a DNA draw. I can also tell you I have specific reason to think he has NOT been considered a suspect in the case until now and he has NOT been cleared by DNA.
AK,
I am fine with you proving me wrong here. I thought he was the perfect suspect for this. It is no coincidence that the crimes he committed also had the parents of prime suspects. I know some FBI thought he was someone to look at and they have ways of getting DNA without you knowing about it. But like I said, I hope you get your confirmation. I just guess a coke bottle or something else has already been tested. I do not know this as fact though.
It would be gross negligence had they not tested Wanda and the nutcase prior to this legally or not.