Question juridique clé
Whether the cantonal appeal court could proceed in writing under Art. 406 CPP after a Federal Supreme Court remand requiring factual clarification and reassessment of self-defense and sentence.
Solution extraite
No. Because the remand required clarification of facts, the appeal court had to hold oral debates; a written procedure was not permitted.
Motifs extraits
Art. 406 CPP allows written appeal proceedings only in limited cases, especially when only legal issues remain. Here, the remand concerned evidentiary and factual questions, so the appellate court had to conduct hearings.