No. 19-6869October Term 2019Decided Apr 27, 2020
Jefferson v. Shinn
The Supreme Court closed the case without taking it up for full review, leaving the lower-court outcome in place.
Case status
- Current stage
- Decided
- Latest event
- Decision released Apr 27, 2020
- What it's about
This is a pending Supreme Court case appealed from the United States Court of Appeals for the Ninth Circuit. The petitioner has filed for a writ of certiorari and requested to proceed in forma pauperis.
Question presented
1. Whether the Ninth Circuit’s “materiality” standard for Brady claims—which requires a petitioner to show that the suppressed evidence “would have” changed the outcome of trial—is contrary to this Court’s clearly established precedent. 2. Whether the Ninth Circuit erred in holding that a state court’s summary denial of a Brady claim is entitled to AEDPA deference when the state court did not have the suppressed evidence before it.
- Case path
United States Court of Appeals for the Ninth Circuit / Decision released Apr 27, 2020
- Area
Decided Supreme Court case
Briefing
What it's about
Jefferson v. Shinn asked the Supreme Court to review how federal courts assess Brady claims (claims that prosecutors hid favorable evidence) and how much deference (respect) they must give a state court's summary denial. The Court declined review, so it did not decide those questions on the merits.
Vote
The prompt indicates the case ended at the petition stage, but it does not provide a vote count or opinion lineup.
Impact
That leaves the Ninth Circuit's result in place for this case without signaling that the Supreme Court agreed with either side. For example, a prisoner making a similar hidden-evidence claim in that circuit still faces the same lower-court rules.
What's next
This Supreme Court docket is over. Any further fight would have to come in lower courts or in a future case raising similar questions.
What was Jefferson v. Shinn about?
It asked whether lower courts used the right test for claims that prosecutors hid evidence. It also asked how much deference federal courts owed a summary state-court denial.
Who is affected by the Supreme Court's action in Jefferson v. Shinn?
Jefferson is directly affected, and similar defendants in the Ninth Circuit may look to the unchanged lower-court approach. The Court did not create a nationwide merits precedent.
What happens next in Jefferson v. Shinn?
Nothing else is scheduled at the Supreme Court in this docket. The lower-court result stays in place unless similar issues return in another case.
Decision
What the Court decided
The Supreme Court closed the case without taking it up for full review, leaving the lower-court outcome in place.
Impact
That leaves the Ninth Circuit's result in place for this case without signaling that the Supreme Court agreed with either side. For example, a prisoner making a similar hidden-evidence claim in that circuit still faces the same lower-court rules.
Not official Court text.
Timing
Decided April 27, 2020
The Court released its decision on April 27, 2020 without hearing oral argument.
Related cases




Grounding
- Grounding
- Primary materials plus reporting.
- Note
- Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.
- Checked
- Jul 25, 2026
- Method
- Methodology