Code of Civil Procedure 170.6 CCP is the California statute that says a judge can be disqualified, or removed, from presiding over a civil lawsuit or a criminal trial if the judge is prejudiced against you or your attorney. When bringing a peremptory challenge, it is not necessary for you to show that the judge is actually biased. It is also not necessary for you to provide any factual basis for your claim. You just have to state that you believe the judge is prejudiced against you and you do not believe you can have a fair and impartial trial.