Can trial counsel waive objections to tainted jurors in Utah criminal cases? State v. Tafuna Explained

In State v. Tafuna, the Utah Court of Appeals addressed when trial counsel’s conduct can waive claims of juror misconduct and the standards for granting mistrials based on inadvertent testimony violations.

Background and Facts

Tafuna was charged with aggravated robbery after a Halloween party incident where he and an accomplice stole items while brandishing knives. Before trial began, a juror mistakenly encountered State witnesses in a courthouse hallway and engaged in approximately two minutes of small talk about airport delays and carpeting. The juror apologized for the contact. Additionally, during trial, a detective inadvertently testified about identification cards found in Tafuna’s coat, violating a pretrial stipulation excluding such evidence.

Key Legal Issues

The court addressed two primary issues: (1) whether the district court erred in allowing the juror who contacted State witnesses to serve on the jury, and (2) whether the court abused its discretion in denying Tafuna’s motion for mistrial after the prohibited identification card testimony.

Court’s Analysis and Holding

Regarding the juror contact, the court acknowledged that Utah law creates a rebuttable presumption of prejudice when juror contact with witnesses goes beyond “mere incidental, unintended, and brief contact.” However, the court found that Tafuna’s counsel waived this objection through the invited error doctrine. Defense counsel affirmatively stated the juror would be “conscious and a good juror,” constituting express approval of continued service. On the mistrial motion, the court applied an abuse of discretion standard and found no error, noting the testimony was inadvertent, fleeting, and ambiguous regarding any criminal implications.

Practice Implications

This decision highlights critical strategic considerations when addressing potential juror misconduct. Defense counsel should avoid making affirmative statements approving a juror’s continued service if they wish to preserve objections for appeal. The court’s analysis demonstrates that even tactical decisions to keep potentially sympathetic jurors can constitute binding waivers. For mistrial motions, counsel should emphasize concrete prejudice rather than speculative harm, as courts require clear evidence that inadvertent testimony actually compromised the defendant’s right to a fair trial.