Key legal question
Whether the federal appeal was admissible under the especially important case requirement for mutual legal assistance involving secret information.
Extracted holding
The appellants did not show an especially important case; the appeal was therefore not admissible.
Extracted reasoning
The alleged ne bis in idem issue did not raise a question of principle. As in prior cases, the Swiss authority had no basis to decide definitively whether the foreign proceedings were identical to the acquitted case; that assessment belongs to the requesting state.