Question juridique clé
Whether the evidence established negligent serious bodily injury and causation under the traffic rules, despite the defendant's in dubio pro reo argument.
Solution extraite
The court found the appellant's challenge partly well-founded: the lower court's causal calculation was arbitrary because it assumed a constant car speed, but one key evidentiary attack was inadmissible as merely appellatory.
Motifs extraits
The Federal Court held that the complaint concerned only whether the cantonal court had to entertain doubt, which is reviewed for arbitrariness. The distance calculation was flawed because the car had in fact decelerated before the collision. The attack on the one-second timing assessment was not substantiated as arbitrary and was therefore inadmissible. Because the causation analysis was arbitrary, the appeal had to succeed.