By the way, that news story you provided a link to does not seem to indicate a formal extradition request, at least not a proper one. No names of the crimnals sought on the request (if it exists) are given, no statement is quoted by the Mexican ambassador to the United States, and the Department of State (the place where all such requests must first be sent to) is not even mentioned. I tend to think it was nothing more than an angry statement by a Mexican politician.