Must Utah juries agree on which specific act constitutes obstruction of justice? State v. Mendoza Explained

In State v. Mendoza, the Utah Court of Appeals addressed a critical issue regarding jury unanimity requirements in obstruction of justice prosecutions, reversing a conviction where defense counsel failed to secure proper jury instructions.

Background and Facts

Police responding to 911 calls about an alleged assault arrived at Mendoza’s home seeking both the assailant and victim. When officers found a young woman who ran into the house, Mendoza emerged and began yelling profanities, telling officers to “get the f*** off my property.” For ten minutes, officers struggled to learn about the woman’s condition while Mendoza continued his verbal tirade from inside his home. Eventually, after his wife intervened, the woman emerged and spoke with police, and Mendoza was arrested for obstruction of justice.

Key Legal Issues

The central issue was whether defense counsel provided ineffective assistance by failing to request either a unanimity instruction or special verdict form for the obstruction charge. Utah Code section 76-8-306 lists ten different ways to commit obstruction of justice, from providing weapons to harboring suspects to providing false information. The jury received an instruction allowing conviction if Mendoza “did any of the” listed acts without requiring unanimity on which specific act he committed.

Court’s Analysis and Holding

The court distinguished between alternative elements and alternative factual theories, citing State v. Alires and State v. Hummel. Unlike theft statutes that describe various means of committing a single crime, the obstruction statute lists distinct acts that each constitute independent alternative elements. The court held that constitutional unanimity requirements mandate that juries agree not only that a defendant is guilty, but also on which specific act satisfied each element. Counsel’s failure to request proper instructions “unreasonably simplified the jury’s task and thereby lightened the State’s burden.”

Practice Implications

This decision reinforces that when statutes contain multiple ways to commit an offense, practitioners must ensure jury instructions require unanimity on the specific act proven. The court noted that none of Mendoza’s conduct clearly satisfied any enumerated element, undermining confidence in the verdict. Defense attorneys should routinely request special verdict forms and unanimity instructions for multi-part statutes, while prosecutors should focus their arguments on specific acts rather than presenting a “grab bag” of alternatives.