Kernrechtsfrage
Whether the court-appointed expert had to recuse because of prior involvement in certification/eiching of the speed device.
Extrahierter Entscheid
No recusal was required: the expert's prior certification activity was not materially connected to the later criminal proceedings, and there was no prior adjudication of the same technical question.
Extrahierte Begründung
The expert had only signed calibration certificates before the criminal case and his reports addressed a different question: whether rule violations in operating the device could have affected the measurement. The mere appearance of bias was not established.