Turner v. United States
The Court upheld the murder convictions of seven men, ruling that evidence the government withheld about a possible alternative attacker was not significant enough to have changed the trial's outcome.
The decision reinforces how demanding the legal standard is for overturning a conviction based on withheld evidence: even clearly favorable evidence that prosecutors should have turned over does not require a new trial unless it realistically could have swayed the jury.
How it got here: The D.C. Superior Court held a 16-day hearing and rejected the men's claims; the D.C. Court of Appeals affirmed, and the men asked the Supreme Court to review.
The Case in Depth
What happened
Catherine Fuller was robbed, beaten, and murdered in a Washington, D.C. alley in 1984. Seven men were convicted in 1985 based largely on testimony describing a large group attack. Years later, the men discovered the government had withheld evidence, including the identity of a man seen near the crime scene and impeachment material about key witnesses, and sought new trials.
The question before the Court
If prosecutors hid evidence pointing to a possible lone attacker, was there a real chance it would have changed the murder trial's outcome?
The Court's answer
No — the Court ruled that the withheld evidence was not significant enough to have realistically changed the trial's outcome. Although prosecutors should have disclosed the evidence about a possible alternative attacker and impeachment material about several witnesses, the group-attack theory was so strongly and consistently supported by multiple witnesses, including two confessed participants and a defendant's own recorded confession, that a lone-attacker defense would have had little chance of persuading the jury.
The Court also found the withheld impeachment evidence was largely repetitive of material the defense already used at trial, so it added little new doubt about the witnesses' credibility. Taken together, the withheld evidence did not undermine confidence in the jury's guilty verdicts, so no new trial was required.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
The ruling makes clear that defendants seeking a new trial over withheld evidence must show more than that the evidence was helpful — they must show a realistic chance it would have changed the verdict. That sets a high bar for defendants nationwide raising similar claims after discovering suppressed evidence years after conviction.
What changes now
This is a final merits decision resolving the men's Brady claims; their convictions remain intact. There is no remand or further proceeding contemplated by this ruling. Any future relief would have to come through other legal avenues, such as new evidence not covered by this decision or executive clemency, since the Supreme Court found no constitutional violation on the record before it.
What this does not decide
The Court did not decide that the withheld evidence was harmless or unimportant in general, or that impeachment evidence never matters once a witness has already been impeached. It decided only that, on this specific trial record, the undisclosed evidence was not strong enough to undermine confidence in these particular verdicts.
Concurrences and dissents
Dissent — Justice Kagan
“The Government got the case it most wanted—the one in which the defendants, each in an effort to save himself, formed something of a circular firing squad.”Kagan's argument that withheld evidence prevented the defendants from mounting a unified defense.
Justice Kagan argued the withheld evidence would have let the defendants abandon their mutually destructive 'not me, maybe them' defenses and unite around a credible alternative-perpetrator theory pointing to James McMillan. She contended the government's eyewitnesses had serious credibility problems, the jury deliberated for over a week even without this evidence, and the combined withheld materials could plausibly have shifted at least one juror's vote, so the men were entitled to a new trial.
How the Court got there
The legal reasoning, step by step
- The Court applied the materiality standard from Brady v. Maryland, which asks whether there is a reasonable probability that disclosing the withheld evidence would have changed the outcome of the trial, in a way that undermines confidence in the verdict.
- The Court weighed the withheld evidence against the entire trial record rather than in isolation, following the instruction that courts must evaluate suppressed evidence in the context of everything the jury heard.
- The Court found that a group attack was the central theme of the prosecution's case, supported by multiple witnesses including two cooperating participants and a defendant's own recorded confession, making a lone-attacker theory hard to reconcile with the trial record.
- The Court reasoned that accepting the men's alternative theory would require concluding that numerous witnesses, including confessed participants, had all lied or been mistaken about a group attack that never happened, which the withheld evidence did not adequately support.
- The Court concluded that the withheld impeachment evidence was largely duplicative of impeachment material already used at trial, so it added little that could have shifted the jury's confidence in the witnesses.
- Combining these findings, the Court concluded there was no reasonable probability that disclosure of the withheld evidence would have changed the trial's result.