Key legal question
Whether the refusal to order an expert examination of the radar device violated the right to be heard or led to arbitrary evidence assessment.
Extracted holding
No. The courts could refuse further expertise based on anticipatory assessment of the evidence; the lower courts' reasoning was detailed and convincing.
Extracted reasoning
The cantonal court properly reviewed the facts under the standards against arbitrariness and in light of the presumption of innocence. The anticipated evidentiary value of a further expert report was adequately assessed under the right to be heard.