When do erroneous jury instructions on accomplice liability require reversal? State v. Eyre Explained

In State v. Eyre, the Utah Supreme Court addressed a critical issue in accomplice liability prosecutions: when erroneous jury instructions on mens rea requirements constitute grounds for reversal based on ineffective assistance of counsel.

Background and Facts

Matthew Eyre was charged as an accomplice to aggravated robbery after Jesse Rakes attempted to rob Daniel Simon at gunpoint and was fatally shot by Simon. The evidence presented conflicting accounts of Eyre’s involvement. While the State argued Eyre actively participated by pretending to look for jumper cables and allegedly brandishing a weapon, Eyre claimed he opposed Rakes’ plan, remained at the back of the vehicle, and was unarmed. Victim testimony supported Eyre’s version, stating he “didn’t do anything to further [the] crime.”

Key Legal Issues

The central issue was whether Jury Instruction No. 40 accurately conveyed the dual mens rea requirements for accomplice liability. Under Utah Code § 76-2-202, accomplice liability requires proof that the defendant both: (1) had the mental state required for the underlying offense, and (2) intentionally aided another in committing that offense. The problematic instruction stated: “If you find beyond a reasonable doubt that: (1) the defendant intentionally, (2) solicited, requested, commanded, encouraged, or intentionally aided another to commit the offense, AND (3) the offense was committed, then you can find the defendant guilty.”

Court’s Analysis and Holding

The Utah Supreme Court found the instruction erroneous because it failed to clarify what “intentionally” referred to—the underlying offense or merely the aiding conduct. This ambiguity permitted conviction without requiring the jury to find Eyre intended the aggravated robbery to occur. The court rejected the State’s argument that other instructions cured this error, finding they created additional confusion rather than clarification. Applying the Strickland standard, the court determined defense counsel’s failure to object constituted deficient performance because mens rea was central to Eyre’s defense. The court found prejudice because competing factual scenarios created a reasonable probability that jurors convicted Eyre based on findings insufficient under correct instructions.

Practice Implications

This decision emphasizes the critical importance of precise jury instructions in accomplice liability cases. Practitioners must carefully scrutinize proposed instructions to ensure they clearly articulate both mental state requirements. The court specifically endorsed Model Utah Jury Instruction CR403B as the preferred framework for accomplice liability instructions. Defense attorneys should object to ambiguous instructions that might permit conviction on a lesser mental state than required, particularly when intent is contested.