Juror Nondisclosure and the Right to a New Trial After the Clancy Mistrial

On September 4, 2026, a Plymouth County jury could not agree on a verdict in the murder trial of Lindsay Clancy, and the judge declared a mistrial. In the coverage that followed, commentators asked whether a juror who concealed information on the confidential questionnaire could undo the proceeding. Massachusetts law answers that question, and the answer is narrower than the public discussion suggested. Concealment can support a new trial in the right case. It does not produce an acquittal, and it does not bar a second trial.

This page explains the standard a Massachusetts defendant must meet to win a new trial based on a juror’s false or incomplete answer. It then addresses the separate rules that govern double jeopardy after a deadlocked jury. It closes with the one motion that can end a case for good after a mistrial. It then applies these rules to a case in the posture of the Clancy prosecution.

The Massachusetts Standard for Juror Nondisclosure

A criminal defendant is entitled to twelve impartial jurors. When a party learns after a verdict that a juror gave a false answer during jury selection, the remedy is governed by a two-part test. The Supreme Judicial Court adopted that test in Commonwealth v. Amirault, 399 Mass. 617 (1987), following the plurality opinion in McDonough Power Equipment, Inc. v. Greenwood, 464 U.S. 548 (1984).

The Supreme Judicial Court restated the test in 2025 in Commonwealth v. Mitchell, 496 Mass. 66 (2025). A defendant must first show that a juror dishonestly answered a material question during voir dire. The defendant must then prove, by a preponderance of the evidence, that the juror was not impartial. Mitchell, 496 Mass. at 74. Both parts are required. A false answer without proof of bias does not entitle a defendant to a new trial.

A Knowing False Answer to a Material Question

The first part of the test concerns the juror’s knowledge. The question is whether the juror knew the answer was false when giving it. An honest mistake does not qualify. In Mitchell, the court explained that an answer is dishonest only if the juror was aware that the answer was inaccurate. Mitchell, 496 Mass. at 74. A juror who forgets a distant event, misunderstands a question, or reads a form too quickly has not lied.

The rule is long settled. In Commonwealth v. Harrison, 368 Mass. 366, 375 to 376 (1975), the court required that a juror’s falsehood during voir dire be unmistakable, material, and knowing. The question must also matter to the juror’s fitness to serve. A concealed fact that has no bearing on impartiality fails the materiality requirement even if the answer was false.

The Separate Requirement of Actual Bias

The second part of the test is where most claims fail. Even a knowing and material falsehood does not, by itself, support a new trial. The defendant must prove that the juror harbored actual bias, or that the surrounding circumstances were so extreme that bias may be presumed as a matter of law. Amirault, 399 Mass. at 624 to 625.

The outcome in Mitchell shows how demanding this requirement is. In Mitchell, a seated juror knowingly gave an inaccurate answer about a relative’s criminal history. The court held that the answer was dishonest, yet it affirmed the denial of a new trial because the defendants did not prove that the juror was biased. Mitchell, 496 Mass. at 74. The court reaffirmed that a defendant is entitled to an impartial jury but is not entitled to perfection in the trial process. Amirault, 399 Mass. at 624.

The court did identify a narrow category of implied bias. Bias may be presumed where a juror was the victim of a crime similar to the one on trial and consciously concealed that fact. Amirault, 399 Mass. at 628 and n.5. Outside that kind of extreme circumstance, the defendant carries the burden of proving that the juror could not decide the case fairly. The finding turns on the juror’s credibility and demeanor. An appellate court therefore reviews a trial judge’s ruling for abuse of discretion, and disturbs it only if it is clearly erroneous. Mitchell, 496 Mass. 66.

The Limits on Questioning Jurors After a Verdict

A defendant cannot interrogate a jury on suspicion alone. To obtain a postverdict inquiry, the moving party must first make a colorable showing, which the court has described as something more than mere speculation. Commonwealth v. Dixon, 395 Mass. 149, 152 (1985). Without that showing, the trial judge has no duty to call jurors back.

The scope of any inquiry is also confined. Section 606(b) of the Massachusetts Guide to Evidence limits what a juror may testify to when a party attacks a verdict. A juror may testify about an inaccurate statement made during jury selection and about extraneous information or outside influence that entered the case. A juror may not testify about the deliberations themselves or about the mental processes behind a vote.

In Commonwealth v. Fidler, 377 Mass. 192, 203 (1979), the court drew a line between objective facts and a juror’s reasoning. A court may examine the first. A court may not inquire into the second. A nondisclosure claim survives that limit because it concerns an empanelment answer, not the content of deliberations.

Concealment on the Questionnaire as a Crime

The confidential juror questionnaire is a sworn document. General Laws chapter 234A, section 22, requires each prospective juror to declare that the answers are true and to sign the form. General Laws chapter 234A, section 32, provides that a willful misrepresentation of a material fact on the questionnaire is a crime. The section applies when a juror misrepresents the fact in order to avoid or to secure jury service. A person who violates the section may be punished by a fine of not more than two thousand dollars.

That criminal exposure belongs to the juror. It is separate from the defendant’s remedy. A juror’s violation of section 32 may support a colorable showing of dishonesty, but it does not relieve the defendant of the obligation to prove bias.

A New Trial as the Only Remedy

The remedy under the Amirault framework is a new trial. A defendant who proves a knowing, material falsehood and actual bias is entitled to try the case again before a properly constituted jury. The defendant is not entitled to a judgment of acquittal, and the Commonwealth is not barred from retrying the charges.

The Amirault framework also applies only after a jury returns a verdict. A defendant brings a motion for a new trial to attack a conviction. Where a case ends in a mistrial, there is no verdict to set aside, and a defendant has no judgment on which to base the motion. This point matters for any case that ends in a deadlock rather than a conviction.

Double Jeopardy After a Deadlocked Jury

A deadlocked jury is not an acquittal. In Richardson v. United States, 468 U.S. 317 (1984), the Supreme Court held that a jury’s failure to agree on a verdict does not terminate jeopardy. A retrial after a hung-jury mistrial does not violate the Double Jeopardy Clause. A hung jury is the classic circumstance in which a second trial is permitted.

There is a narrow exception, and it concerns the prosecutor, not the jury. Where the government intended to provoke a mistrial in order to avoid an acquittal, a retrial may be barred. Oregon v. Kennedy, 456 U.S. 667 (1982). That exception turns on prosecutorial intent. A juror’s concealment on a questionnaire does not fit within it. A fuller treatment of double jeopardy in Massachusetts is available on this site.

The Required Finding of Not Guilty After a Mistrial

There is one route that can end a case after a mistrial, and it has nothing to do with the jury’s composition. Massachusetts Rule of Criminal Procedure 25(b)(2) allows a defendant to move for a required finding of not guilty after the jury has been discharged without a verdict. The motion tests whether the Commonwealth’s evidence was legally sufficient to support a conviction, measured under the standard of Commonwealth v. Latimore, 378 Mass. 671 (1979).

A required finding is an acquittal. When a court determines that the trial evidence was legally insufficient, double jeopardy bars a retrial. Burks v. United States, 437 U.S. 1 (1978).

Whether a defendant faces a second trial turns on this difference. A hung jury sends the case back for retrial. A required finding of not guilty ends it. The distinction depends on the strength of the Commonwealth’s evidence, not on what a juror wrote on a form. This motion is addressed at greater length in a separate discussion of Rule 25, and in the earlier update on the Clancy case.

The Clancy Case After the Mistrial

Applied to the Clancy prosecution, these rules produce a result that surprises many readers. News reports described the jury as heavily favoring acquittal and raised questions about whether a seated juror had disclosed prior involvement with the courts. Even if such a question were pursued and answered against the juror, it would carry little force for the defense in this posture. The trial ended in a mistrial, not a conviction. There is no verdict for a defendant to undo through a nondisclosure claim, and a new trial is the outcome a mistrial already produces.

The live questions after the Clancy mistrial lie elsewhere. The first is whether the Commonwealth will seek a second trial, which Richardson permits after a deadlock. As of mid-September 2026, the Commonwealth had not announced a decision. The second is the defense’s renewed motion for a required finding of not guilty under Rule 25(b)(2), filed on September 10, 2026. That motion turns on the sufficiency of the evidence of criminal responsibility, not on the makeup of the jury. Those two questions, not the questionnaire, will determine whether the case is tried again.

Defense at Trial and After a Mistrial

Attorney Joe Serpa defends people charged with serious crimes in the Massachusetts trial courts, at trial and in the motions that follow a mistrial. A deadlocked jury does not end a case on its own, and the decisions that follow a mistrial carry the same weight as the trial itself. Anyone facing a retrial, or weighing a motion after a jury has been discharged, can contact the office to discuss the record and the available motions.

This post is for general informational purposes only and is not legal advice. It is based solely on public court proceedings, public reporting, and published decisions and does not reflect any non-public information. Reading it does not create an attorney-client relationship. This may constitute attorney advertising.