Questione giuridica chiave
Whether the challenge to the expert on alleged bias was timely and admissible
Decisione estratta
The objection was raised too late because the alleged ground was known well before the appeal and no prompt recusal request was made.
Motivazione estratta
Recusal grounds must be raised immediately once known; by submitting supplementary questions to the expert, the appellant accepted the expert and forfeited the objection.