Key legal question
Whether the order of non-prosecution qualified as a non-lieu decision and was amenable to a nullity appeal by the cantonal public prosecutor
Extracted holding
Yes. The challenged ruling confirmed the investigating magistrate's non-prosecution order and thus constituted a non-lieu decision within the meaning of the federal procedural statute; the cantonal public prosecutor was entitled to appeal.
Extracted reasoning
The decision ended the criminal proceedings on the reported count and therefore fell within the statutory category of a non-lieu decision; the public prosecutor had standing to bring the nullity appeal.