Can impeachment evidence about officer misconduct support postconviction relief? Monson v. Salt Lake City Explained

The Utah Court of Appeals in Monson v. Salt Lake City addressed whether evidence of an arresting officer’s disciplinary problems and alleged misconduct in other cases can provide grounds for postconviction relief. The decision clarifies important distinctions between exculpatory evidence and impeachment evidence in the postconviction context.

Background and Facts

Todd Monson was arrested for DUI by Utah Highway Patrol Trooper Lisa Steed in 2009 and subsequently pled guilty to a reduced charge of impaired driving in 2010. In 2012, internal UHP correspondence became public revealing that Steed had been disciplined for violating departmental policies, including performing nonconsensual blood draws without assistance, failing to notify dispatch during stops, and removing her external microphone. Additional evidence suggested Steed may have falsified information in other DUI cases, with an internal investigation finding discrepancies between her reports and toxicology results in eleven of twenty sampled cases.

Key Legal Issues

The court addressed whether the newly discovered evidence about Steed’s misconduct entitled Monson to relief under the Post-Conviction Remedies Act. Specifically, the court examined whether this evidence was truly exculpatory or merely impeachment evidence, and whether the prosecution had a constitutional obligation to disclose such evidence during plea negotiations.

Court’s Analysis and Holding

Following Medel v. State, the court held that defendants who plead guilty waive all non-jurisdictional challenges except claims that the plea was involuntary or unknowing. The court determined that Steed’s disciplinary violations and alleged misconduct in other cases constituted merely impeachment evidence that would have affected her credibility but did not suggest Monson’s factual innocence. Importantly, the court noted that under United States v. Ruiz, the Constitution does not require disclosure of impeachment evidence during plea negotiations. The court also ruled that the PCRA specifically excludes “merely impeachment evidence” from qualifying as newly discovered evidence supporting relief.

Practice Implications

This decision reinforces the high bar for postconviction relief based on newly discovered evidence. Practitioners must demonstrate that evidence is truly exculpatory—suggesting factual innocence or undermining confidence in the proceedings—rather than merely affecting witness credibility. The ruling also confirms that prosecution obligations under Brady v. Maryland are more limited in the plea context than at trial.