The problem are extradition agreements - on which Buttarelli has no power - an giving him asylum is a delicate political decision, which has to be taken at the highest level, and would require to anger US, a price no one is willingly to pay.
The problem are extradition agreements - on which Buttarelli has no power - an giving him asylum is a delicate political decision, which has to be taken at the highest level, and would require to anger US, a price no one is willingly to pay.