In 2007, two teenage sisters were sexually assaulted in the bathroom of a Colorado horse-racing facility. The girls identified the assailant as a racetrack employee, and police arrested Miguel Angel Peña-Rodriguez. Each girl separately identified him as the man who assaulted her. State prosecutors charged Peña-Rodriguez with harassment, unlawful sexual contact, and attempted sexual assault on a child.
Before the jury was empaneled, members of the venire received a written questionnaire asking if anything would make it difficult to be a fair juror. The court and defense counsel repeatedly asked prospective jurors whether they could be fair and impartial. None of the empaneled jurors expressed reservations based on racial bias. After a three-day trial, the jury convicted Peña-Rodriguez of unlawful sexual contact and harassment but failed to reach a verdict on the attempted sexual assault charge.
When the jury was discharged, the court gave the mandated instruction that whether jurors discussed the case was their own decision. Following discharge, two jurors remained in the jury room to speak privately with defense counsel. They reported that during deliberations another juror, identified as H.C., had expressed anti-Hispanic bias toward Peña-Rodriguez and his alibi witness. With the trial court's supervision, counsel obtained sworn affidavits from the two jurors.
The affidavits stated that H.C. said Mexican men had a bravado that caused them to believe they could do whatever they wanted with women. The affidavits further stated that nine times out of ten Mexican men were guilty of being aggressive toward women and young girls. H.C. believed Peña-Rodriguez was guilty because he is Mexican and Mexican men take whatever they want. H.C. did not find the alibi witness credible because the witness was an illegal.
The trial court acknowledged H.C.'s apparent bias. It denied Peña-Rodriguez's motion for a new trial on the ground that Colorado Rule of Evidence 606(b) generally prohibits a juror from testifying about statements made during deliberations in a proceeding inquiring into the validity of the verdict. A divided panel of the Colorado Court of Appeals affirmed, agreeing that the statements did not fall within an exception to the rule. The Colorado Supreme Court affirmed by a 4-3 vote.
The United States Supreme Court granted certiorari to decide whether there is a constitutional exception to the no-impeachment rule for instances of racial bias.