Kernrechtsfrage
Whether mutual legal assistance required the U.S. criminal proceedings to remain pending and whether the Swiss authority had to inquire further into the foreign proceedings.
Extrahierter Entscheid
The request was not moot: it had not been withdrawn and the U.S. proceedings were not finally concluded, so no assistance barrier existed and no further inquiry was required.
Extrahierte Begründung
Under the treaty, assistance becomes moot only if the request is expressly withdrawn or the foreign case has ended by final judgment. The appellants themselves acknowledged that the U.S. proceedings were still pending.