yes, plenty. national authorities are fully capable and familiar with crypto currency transactions and how to request coordination to subpoena foreign exchanges

yes, plenty. national authorities are fully capable and familiar with crypto currency transactions and how to request coordination to subpoena foreign exchanges. its happened plenty of times and funds have been recovered, its usually in Department of Justice press releases and an associated court filing. Other times you can just talk to people that were involved in an investigation. Not really news, stuff happens way after the event.