Key legal question
Whether the cantonal court's factual findings were arbitrary and violated the presumption of innocence / in dubio pro reo
Extracted holding
No. The findings were supported by the file, and the inference that the appellant did not properly check the opposite lane was not arbitrary.
Extracted reasoning
The Supreme Court held that the motorcycle had to be visible for at least a short distance before the turn; the appellant admitted seeing no vehicle, which supported the conclusion that he was not attentive to oncoming traffic.