Francis Di Domizio wrote: Even if the Pope changed the law now I imagine there would be questionable legal standing to extradite for a past crime. Not sure of the legal systems of the Vatican, but Archbishop Wesolowski could probably put up a strong fight against any extradition.
Not true. Since the Vatican has no extradition treaties with any other nation, there would be no violation of any treaty or another nation's laws.
The pope could just render the wanted man and deport him. You've heard of renditions, haven't you? They might violate the U.S. Constitution, but that doesn't apply to an absolute monarchy.