The right and proper thing to do would be to just simply return the skull to its RIGHTFUL place where it should be. That would be the decent and respectful thing to do plain and simple. I think that by holding on to it and not returning it says a lot about the person who has it. No one has the right to that skull! Maybe when he dies someone will use his skull for an ashtray and not return it. How would he or his family like that I wonder?