In 1988, in U.S. v. Krzyske,[31], the jury asked the judge about jury nullification. The judge responded "There is no such thing as valid jury nullification." The jury convicted the defendant, and the judge's answer was upheld on appeal.
In 1997, in U.S. v. Thomas,[32] the U.S. Court of Appeals for the Second Circuit ruled that jurors can be removed if there is evidence that they intend to nullify the law, under Federal Rules of Criminal Procedure 23(b). The Second Circuit also stated, however, that the court must not remove a juror for an alleged refusal to follow the law as instructed unless the record leaves no doubt that the juror was in fact engaged in deliberate misconduct--that he was not simply unpersuaded by the Government's case against the defendants.
"We categorically reject the idea that, in a society committed to the rule of law, jury nullification is desirable or that courts may permit it to occur when it is within their authority to prevent. Accordingly, we conclude that a juror who intends to nullify the applicable law is no less subject to dismissal than is a juror who disregards the court's instructions due to an event or relationship that renders him biased or otherwise unable to render a fair and impartial verdict."
In 2001, a California Supreme Court ruling on a case involving statutory rape led to a new jury instruction that requires jurors to inform the judge whenever a fellow panelist appears to be deciding a case based on his or her dislike of a law.[33] People v. Williams, 25 Cal.4th 441, 106 Cal.Rptr.2d 295, 21 P.3d 1209. However, the ruling could not overturn the practice of jury nullification itself because of double jeopardy: a defendant who has been acquitted of a charge cannot be charged a second time with it, even if the court later learns jury nullification played a role in the verdict.