Kernrechtsfrage
Whether refusing the requested expert report violated the appellants' right to be heard.
Extrahierter Entscheid
Yes. In a serious fatal traffic case, the requested expert evidence was not manifestly irrelevant and could objectively help clarify visibility and the driver’s statements.
Extrahierte Begründung
The cantonal authorities relied mainly on the driver's statements without objective corroboration. Given the gravity of the incident and limited evidence, further fact-finding was required. The court held that the expert report could help assess whether the victim was visible during the reverse maneuver, so refusing it breached Art. 29(2) of the Constitution.