Justice isn't for vengeance, it is for protection. Tate clearly has no expressed any concern over the girl's death, so there is no reason that he won't do it again. I'm not calling for the kid's head, but if he isn't safe to let out on the streets, what is he doing out? Prisons are designed to protect innocent people, from people like him. If you could assure me that he is rehabilitated, then fine, but you can't, and his psychiatrists seem to say otherwise.
I just pray to God that no other innocents have to lose their lives or loved ones because of this.