Key legal question
Whether the public prosecutor had standing to file the federal criminal appeal under Art. 81 BGG.
Extracted holding
The appeal was not admissible because the prosecutor failed to show a legally protected interest in annulment or amendment of the cantonal decision; the decision actually granted the outcome the prosecutor had sought.
Extracted reasoning
The challenged decision ordered continuation of the investigation, matching the prosecutor's position. The appellant did not explain any remaining legal interest in a federal appeal.