Brady Violations in Utah Criminal Appeals: The Duty to Disclose Exculpatory Evidence

In Brady v. Maryland, 373 U.S. 83 (1963), the United States Supreme Court held that the suppression by the prosecution of evidence favorable to an accused violates due process where the evidence is material to guilt or punishment — regardless of the good or bad faith of the prosecution. This principle — now known simply as “Brady” — imposes an affirmative constitutional duty on prosecutors to disclose exculpatory and impeachment evidence to the defense before trial.

When that duty is violated, the resulting conviction may be reversed on appeal or in post-conviction proceedings. Brady violations are among the most common bases for post-conviction relief and are regularly litigated in direct appeals where the withheld evidence comes to light during trial or in the immediate post-conviction period.

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The Three Elements of a Brady Violation

The Supreme Court refined the Brady framework in Strickler v. Greene, 527 U.S. 263 (1999), identifying three essential elements:

1. Favorable evidence. The evidence must be favorable to the defendant — either exculpatory (tending to negate guilt or reduce culpability) or impeaching (undermining the credibility of a prosecution witness).

2. Suppression. The prosecution suppressed the evidence — either withheld it from the defense after a specific request, or failed to disclose it where no request was made but the evidence was material.

3. Materiality (prejudice). The suppression resulted in prejudice — there is a reasonable probability that, had the evidence been disclosed to the defense, the result of the proceeding would have been different. A “reasonable probability” means a probability sufficient to undermine confidence in the outcome. This is not a preponderance standard and does not require certainty of a different result.

All three elements must be established. The materiality requirement is the one most often dispositive: evidence that was withheld but would not have changed the outcome — because it was cumulative of evidence the defense already had, or because it addressed an issue not central to the verdict — will not produce reversal even if it clearly meets the first two elements.

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Giglio: Brady Extended to Witness Credibility

Giglio v. United States, 405 U.S. 150 (1972), extended Brady to encompass evidence that impeaches the credibility of prosecution witnesses — particularly evidence of deals, promises, or threats made to secure testimony from cooperating witnesses. When a prosecutor offers leniency, payment, or other inducements to a witness in exchange for testimony, and fails to disclose those arrangements to the defense, the resulting testimony is constitutionally tainted.

Giglio violations are particularly significant because:

• Many prosecutions rely heavily on cooperating witness testimony
• The arrangements with cooperating witnesses are frequently undisclosed or inadequately disclosed
• The failure to disclose the full extent of cooperation agreements may be characterized as a good-faith oversight, but materiality does not depend on bad faith

A Giglio claim requires showing that the witness received benefits from the prosecution that were not disclosed, that the withheld information would have provided material impeachment, and that there is a reasonable probability the outcome would have been different had the jury known of the arrangements.

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The Duty is Collective: What One Prosecutor Knows, All Know

Brady’s disclosure obligation extends to all information in the constructive possession of the prosecution team — meaning information possessed by any government agent working on the case, including law enforcement. The prosecution cannot defeat a Brady claim by arguing that withheld information was possessed by the investigating officers rather than the prosecuting attorneys. The duty extends to the state as an entity.

This principle has significant implications: when police possess exculpatory information — a witness’s prior inconsistent statement, a laboratory result favorable to the defense, an investigative report excluding the defendant — and that information never reaches the prosecutors (or is never disclosed to the defense), a Brady violation may have occurred even if the prosecutors themselves were unaware.

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Brady in Direct Appeals vs. Post-Conviction Proceedings

Brady violations present a specific procedural challenge in direct appeals: the evidence was withheld, so by definition it is not in the trial record. The appellate court, limited to the trial record, cannot typically evaluate a Brady claim that requires the court to consider evidence outside the record.

There are two paths:

Where the withheld evidence came to light during trial. Sometimes Brady violations are discovered in the middle of a trial — through a document produced late, a witness’s unexpected admission, or information that surfaces during cross-examination. When the Brady violation was identified during trial, a specific objection or mistrial motion preserves it for direct appeal on the trial record.

Where the evidence was discovered after trial. When Brady material comes to light only after the verdict — through post-conviction investigation, responses to freedom of information requests, or cooperation from a subsequent prosecution — the appropriate vehicle is typically a post-conviction relief petition under the PCRA, where the newly discovered evidence can be formally introduced. We cover this in our post on post-conviction relief in Utah.

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Distinguishing Brady From Lost Evidence Claims

Not every failure to preserve or produce evidence constitutes a Brady violation. When police or prosecutors fail to preserve evidence — as opposed to affirmatively withholding it — the constitutional standard is different and less protective.

As illustrated in Lotus’s Opinions analysis of State v. Mohamud, due process claims based on lost or destroyed evidence require a specific showing of what the lost evidence would have shown — not mere speculation about its potential value. A claim that destroyed surveillance footage might have helped the defense fails if the defendant cannot point to specific evidence that the footage would have been exculpatory.

The distinction: Brady applies to known exculpatory evidence that was withheld. A due process claim based on lost evidence requires showing the evidence was material and exculpatory — not merely useful to the defense — and, where the loss was negligent rather than in bad faith, may require a showing of bad faith depending on which doctrine applies.

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Standard of Review

Brady violations are constitutional claims reviewed de novo on appeal. The three elements — favorability, suppression, and materiality — are legal questions the appellate court evaluates independently. However, where the Brady claim depends on factual findings — what the prosecution knew, when it knew it, what information was actually possessed — those factual predicates are reviewed for clear error.

When a Brady violation is established, the State bears the burden of showing the error was harmless beyond a reasonable doubt — the constitutional harmless error standard, which is more demanding than the ordinary harmless error analysis applicable to non-constitutional trial errors.

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KEY RULE

Brady v. Maryland — The Disclosure Obligation

The prosecution must disclose evidence favorable to the defendant — exculpatory or impeaching — when that evidence is material to guilt or punishment. Materiality requires a reasonable probability that, had the evidence been disclosed, the result would have been different. The obligation extends to all evidence in the constructive possession of the prosecution team, including evidence held by law enforcement. Brady violations are reviewed de novo; when established, the State bears the burden of harmlessness beyond a reasonable doubt. Giglio extends this to undisclosed cooperation agreements with prosecution witnesses. Brady v. Maryland, 373 U.S. 83 (1963); Giglio v. United States, 405 U.S. 150 (1972); Strickler v. Greene, 527 U.S. 263 (1999).

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If Evidence Was Withheld in Your Case

Brady violations are most often discovered through post-conviction investigation — scrutinizing law enforcement files, reviewing prosecutor’s notes obtained through GRAMA requests, or learning of undisclosed witness arrangements. If new information has come to light suggesting withheld exculpatory or impeachment evidence, the timing matters: one year from discovery to file a PCRA petition, and the analysis must connect the withheld evidence to a reasonable probability of a different outcome. Lotus Appellate Law handles Brady claims in both direct appeals and post-conviction proceedings throughout Utah. Contact us to evaluate your case.