OK. No hurries. I can't help but think, given the laws, rulings, nations and people in play here that the possibility of actually discovering whether or not those girls were harmed (apart from "because, money. secrets") that that would, above all, be the paramount question to answer and fuck all in between if those that have questions could have, should have, can but won't ask these questions, in any setting. And, if the accusations turn out to be more than sufficient to arrest him for real crimes committed, the host nation would, I should think, give more credence to the possibility that they're sheltering a potentially (to other women) dangerous person and that person should be tried.
From a "wow, those law books sure are thick" perspective I perceive a thread of aggression in these events that, on the level of nations, doesn't seem justified. There seems the very real and sufficient threat of extradition to yet a fourth country that is seen as unjust by the third country and the objective here must be to have either the fourth country admit as much and deal with the third country directly or for the second country to regress or seek redress from a world court respective of all four countries, should one exist. Or, more likely, the pieces will simply remain on the board as placed.