Key legal question
Whether a regional prosecutor of Valais has standing to file a nullity appeal to the Federal Court as public prosecutor of the canton.
Extracted holding
No. Only the cantonal attorney general, as the sole public prosecutor competent for the entire canton, may file a nullity appeal; a regional prosecutor lacks standing.
Extracted reasoning
Under Art. 270 let. c PPF, the public prosecutor entitled to appeal is the authority charged under cantonal law with defending the public interest before the cantonal court of last instance. Valais law gives the attorney general canton-wide authority, while regional prosecutors are territorially limited. Federal law reserves standing to the single cantonal public prosecutor and does not allow cantonal derogation.