Question juridique clé
Whether refusing to hear the appellant's superior as witness violated the right to be heard and was arbitrary.
Solution extraite
No. The anticipated testimony would not have changed the conviction because the existing evidence already supported the finding that the danger could have been avoided by other means.
Motifs extraits
The court accepted the lower court's anticipatory assessment of evidence: the mission's urgency and importance were already acknowledged, but other means to reach Geneva without speeding remained available.