Yes, you can request a different judge in a criminal case, but how you do it depends on where the case is pending. Many state courts let the defense swap out the assigned judge one time without giving any reason, through a procedure called peremptory substitution. In federal court, and in states without that option, you have to file a disqualification motion and show a legal ground: personal bias, a financial conflict, a family connection, or prior involvement in the matter.
The ground you’re relying on, the court you’re in, and the timing of your request will all shape whether the motion has a realistic chance.
The Easy Path: Peremptory Substitution in State Court
Several states offer something federal courts do not: a one-time removal of the assigned judge, no reason required. You file a short written motion or notice, and the court reassigns the case. No evidence of bias, usually no hearing.
The rules vary. In Missouri, a written application filed at least three days before a preliminary hearing triggers an automatic change of judge, and the application doesn’t have to allege any reason. Montana allows both the state and each defendant one substitution by written motion. Minnesota uses a notice to remove filed within a set window before trial. Oregon and Illinois go further, allowing two peremptory challenges in criminal cases. Indiana and Nevada are at the other end: peremptory challenges there are limited to civil cases and unavailable to criminal defendants.
Where this option exists, it is by far the easiest way to get a different judge. The catch is timing. Most states require the motion early in the case, often well before trial, and missing the deadline waives the right. Defense attorneys in these states treat the decision as something to make shortly after the judge is assigned, not something to save for later.
Federal Disqualification: Two Statutes, Two Procedures
Federal law gives you two routes, and they work differently.
Section 455: The Broader Motion
The main federal disqualification statute, 28 U.S.C. § 455, starts with a catch-all: a federal judge must step aside whenever a reasonable person would question the judge’s impartiality.1Office of the Law Revision Counsel. 28 USC 455 – Disqualification of Justice, Judge, or Magistrate Judge It also lists specific situations where disqualification is mandatory:
- The judge holds a personal bias toward a party or personally knows disputed facts in the case.
- The judge previously served as a lawyer in the same matter, or practiced at a firm where a colleague handled it.
- The judge previously worked for the government and participated as counsel or adviser in the proceeding, or expressed an opinion about its merits. This comes up when a judge previously served as a prosecutor.
- The judge, a spouse, or a minor child in the household has a financial stake in a party or in the subject of the case.
- The judge’s spouse, or anyone within three degrees of relationship to either the judge or the judge’s spouse, is a party, a lawyer, or a likely witness.1Office of the Law Revision Counsel. 28 USC 455 – Disqualification of Justice, Judge, or Magistrate Judge
Either party, or the judge personally, can raise § 455 grounds. There is no statutory cap on how many times the issue can be raised. Federal regulations require that a motion to recuse be supported by an affidavit setting out the alleged grounds.2eCFR. 28 CFR 76.16 – Disqualification of a Judge
Section 144: The Bias Affidavit
Under 28 U.S.C. § 144, a party who believes the assigned judge has a personal bias or prejudice can file a sworn affidavit stating the facts. If the affidavit is timely and legally sufficient, the judge “shall proceed no further” and a different judge must be assigned.3Office of the Law Revision Counsel. 28 USC 144 – Bias or Prejudice of Judge The language is mandatory, which makes this a powerful tool when the affidavit clears the bar.
The limits are strict. You get only one affidavit per case, so filing on weak grounds burns your only chance. The affidavit must be filed at least ten days before the start of the term when the case will be heard, unless you can show good cause for the delay. It must include a certificate of good faith from your attorney, confirming the filing isn’t for strategic purposes or delay. And the facts have to be specific and personal to the judge; vague allegations or complaints about rulings won’t do.3Office of the Law Revision Counsel. 28 USC 144 – Bias or Prejudice of Judge
What Counts as Bias, and What Doesn’t
The most common misconception about judicial disqualification is that a judge who rules against you is biased. The Supreme Court addressed this in Liteky v. United States, establishing what’s known as the extrajudicial source doctrine. Bias that justifies recusal almost always has to come from outside the courtroom, not from what the judge learned or observed during the case itself.4Justia. Liteky v. United States, 510 U.S. 540 (1994)
Rulings alone almost never support a recusal motion. A judge who denies your suppression motion or allows damaging testimony is doing the job. Hostile remarks toward counsel or the parties during trial don’t automatically qualify either. The Court recognized only a narrow exception: conduct within the proceedings can warrant recusal if it reveals “such a high degree of favoritism or antagonism as to make fair judgment impossible.”4Justia. Liteky v. United States, 510 U.S. 540 (1994) A judge who seems irritated with your lawyer is not disqualified. A judge who announces from the bench that all defendants in drug cases are guilty before hearing evidence is.
Practically, if your only evidence of bias is that the judge ruled against you, the motion will fail. You need something from outside the courtroom (a personal relationship with the victim’s family, a financial interest in a party, public statements about the case) or courtroom conduct extreme enough that no reasonable person could call it impartial.
Timing and Procedure
Courts expect disqualification motions to be raised promptly after the grounds become known. Sitting on the information and filing after an unfavorable ruling signals that the motion is strategic rather than genuine, and courts regularly deny late-filed motions on that basis.
Who decides the motion depends on the statute. Under § 455, the challenged judge typically reviews the motion first. This strikes many defendants as unfair, because the person accused of bias is the one ruling on the accusation, but that is the standard procedure. The judge examines whether the allegations, taken as true, meet the legal standard. If the judge agrees or recognizes a conflict, voluntary recusal follows and the case is reassigned.
Section 144 works differently. If the affidavit is facially sufficient (meaning it states specific facts that, if true, would show personal bias), the challenged judge must step aside. The court doesn’t hold a hearing on whether the allegations are actually true; it evaluates only whether the affidavit is legally adequate on its face.3Office of the Law Revision Counsel. 28 USC 144 – Bias or Prejudice of Judge
When a motion succeeds, prior rulings from the original judge generally remain in effect. The replacement judge inherits the case and isn’t required to redo every pretrial decision, though the new judge has discretion to reconsider earlier rulings if asked. Defense attorneys sometimes use the reassignment as an opening to revisit unfavorable pretrial orders.
If the Motion Is Denied
A denied disqualification motion doesn’t end the issue, but the paths forward are narrow. The most common option is to raise the denial on appeal after a conviction. Appellate courts review recusal decisions for abuse of discretion, which gives the trial judge significant deference. You’ll need to show the denial was clearly wrong, not just debatable.
In rare cases, a party can seek a writ of mandamus from the appellate court, asking it to order the trial judge to step aside immediately rather than waiting for a final judgment. Mandamus is an extraordinary remedy, granted only when the right to relief is clear and no other adequate avenue exists. The petition must be filed with the circuit clerk and served on all parties, and it must lay out the relief sought, the issues, the relevant facts, and the reasons the writ should issue.5Legal Information Institute. Rule 21 – Writs of Mandamus and Prohibition, and Other Extraordinary Writs The trial judge isn’t treated as a respondent and doesn’t participate unless the appellate court invites it. In practice, mandamus succeeds in recusal disputes only when the disqualifying facts are so clear-cut that reasonable judges couldn’t disagree.
Can the Parties Waive Disqualification?
Not all grounds are absolute. Under 28 U.S.C. § 455(e), if the only basis for disqualification is the general “reasonable question of impartiality” standard, the parties can agree to waive it. The judge must first make a full disclosure on the record of why disqualification might be warranted, and the waiver has to come after that disclosure.1Office of the Law Revision Counsel. 28 USC 455 – Disqualification of Justice, Judge, or Magistrate Judge
The specific mandatory grounds (personal bias, financial interest, family connections, prior involvement) cannot be waived.
Why an Attorney Matters Here
Disqualification is one of the areas where an experienced criminal defense attorney makes a measurable difference. The one-affidavit limit under § 144 means a poorly drafted filing wastes the only shot. Timing requirements are unforgiving. The factual showing required (specific evidence of extrajudicial bias, not a feeling that the judge is hostile) demands careful documentation.
Lawyers who have practiced before the same judges often have the best read on whether a recusal motion has a realistic chance or will simply antagonize the court. A weak motion can backfire by telling the judge the defense views them as unfair, without actually changing who hears the case. Before filing, the strategic question is as important as the legal one.