How do you prove an umpire is biased in Texas court?

Question

Accepted Answer

This question has been addressed in 1 Texas court opinion(s), including In Re Germania Farm Mutual Insurance Association. Parties cannot disqualify a court-appointed professional—such as a custody evaluator or receiver—based on vague reputations or prior adverse rulings in unrelated cases; disqualification requires specific, admissible proof of bias or partiality within the current litigation.

Umpire Bias

How do you prove an umpire is biased in Texas court?