Utah Court of Appeals
Can defective jury instructions still fail to establish prejudice in ineffective assistance claims? State v. Perez Explained
Summary
Perez was convicted of possessing a dangerous weapon as a restricted person after officers found a sharpened piece of plastic (shiv) in his prison cell. He argued on appeal that his counsel was ineffective for failing to object to a jury instruction that omitted three statutory factors and included non-statutory language about items ‘commonly known’ as dangerous weapons.
Analysis
The Utah Court of Appeals in State v. Perez demonstrates that even when jury instructions contain clear legal errors, defendants must still prove that the defects actually prejudiced their case to succeed on ineffective assistance of counsel claims.
Background and Facts
During a routine cell search at the Utah State Correctional Facility, officers discovered Perez had concealed a sharpened piece of plastic—a shiv—wrapped in a shirt. The State charged him with possessing a dangerous weapon as a restricted person. At trial, an officer testified that based on his training and experience, the shiv was a dangerous weapon used for protection and to harm others, having seen similar objects cause severe injuries requiring hospitalization.
Key Legal Issues
The jury instruction defining dangerous weapon contained significant defects: it omitted three of six statutory factors required under Utah Code § 76-11-101(3)(b) and included non-statutory language about items “commonly known” as dangerous weapons. Perez argued his counsel’s failure to object constituted ineffective assistance because his defense strategy focused on convincing the jury to convict only on the lesser offense of possessing contraband.
Court’s Analysis and Holding
The Court of Appeals acknowledged the instruction “should have tracked the statute” but analyzed whether inclusion of the omitted factors would have changed the outcome. Applying State v. Salsman, the court found that the three missing factors—location and circumstances of possession, primary purpose of the object, and potential imminent threat to public safety—would have harmed rather than helped Perez’s case. The shiv was concealed in a prison setting, designed for stabbing, and posed clear threats to inmates and staff.
Practice Implications
This decision reinforces that prejudice analysis in ineffective assistance claims requires careful examination of how proper instructions would have affected the outcome. Even facially defective jury instructions will not establish prejudice if the missing legal standards would have strengthened the prosecution’s case. Defense attorneys challenging jury instructions must demonstrate that proper instructions would have created a reasonable probability of a different result.
Case Details
Case Name
State v. Perez
Citation
2026 UT App 57
Court
Utah Court of Appeals
Case Number
No. 20240808-CA
Date Decided
April 16, 2026
Outcome
Affirmed
Holding
A defective jury instruction on statutory factors for determining dangerous weapons did not prejudice defendant where the omitted factors would have strengthened rather than weakened the prosecution’s case
Standard of Review
Ineffective assistance of counsel claims raised for the first time on appeal are decided as a matter of law
Practice Tip
When challenging jury instructions on appeal, carefully analyze whether inclusion of omitted statutory factors would actually benefit your client’s case before arguing prejudice
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