Question juridique clé
Whether the federal nullity complaint could challenge alleged violations of the right to be heard and the credibility of the blood-alcohol finding.
Solution extraite
The complaint was inadmissible insofar as it invoked constitutional rights or attacked the cantonal fact-finding and evidence assessment.
Motifs extraits
Under the former criminal cassation procedure, only federal law violations could be reviewed; constitutional complaints and evidentiary disputes belonged to the separate constitutional complaint route, and the Federal Court was bound by the cantonal findings.