Question juridique clé
Whether the federal criminal nullity appeal could rely on facts differing from the cantonal findings and on evidentiary complaints.
Solution extraite
The court would not enter into challenges that attacked the factual findings or evidentiary assessment, because the appeal was limited to violations of federal criminal law.
Motifs extraits
The Federal Court is bound by the cantonal findings; credibility and evidence-taking issues fall outside the scope of nullity review.