No. 19-7862October Term 2019Decided Nov 1, 2021
Coonce v. United States
Before any argument, the case asks whether federal death-penalty law gives enough protection to a defendant whose intellectual disability allegedly began after age 18 and whether confrontation rights apply when a jury chooses a death sentence.
Case status
- Current stage
- Decided
- Latest event
- Decision released Nov 1, 2021
- What it's about
This case involves a federal death-row inmate who argues that he cannot be executed because he is intellectually disabled, even though the lower court held that his disability did not begin before age 18. It also asks whether prosecutors may use testimonial hearsay at the penalty phase of a federal capital trial to prove facts supporting a death sentence.
Question presented
1. Whether the court of appeals correctly concluded that petitioner is not intellectually disabled under Atkins v. Virginia, 536 U.S. 304 (2002), because his alleged deficits did not manifest before age 18. 2. Whether the Sixth Amendment’s Confrontation Clause applies to the sentence-selection phase of a federal capital sentencing proceeding, which occurs after the jury has unanimously found beyond a reasonable doubt that the defendant is statutorily eligible for a death sentence.
- Case path
United States Court of Appeals for the Eighth Circuit / Decision released Nov 1, 2021
- Area
Criminal Procedure
Briefing
What it's about
A federal death-row inmate is asking the Supreme Court to review whether he can be executed when the lower court said his intellectual disability did not begin before age 18. He also argues that the Sixth Amendment's Confrontation Clause (the right to cross-examine witnesses) should limit prosecutors' use of testimonial hearsay during the penalty phase of a federal capital trial.
Vote
The case is pending, and oral argument has not been scheduled. Coonce argues the lower court wrongly treated age 18 as a cutoff for intellectual disability and wrongly allowed testimonial hearsay at the sentence-selection phase.
Impact
The case could affect federal capital defendants who have low IQ scores and serious adaptive deficits but cannot prove those problems began before age 18. It could also determine whether a jury deciding between life and death may hear testimonial statements from witnesses who are not cross-examined.
What's next
Watch for oral argument or another scheduling move from the Court. No decision window is available yet.
What is Coonce asking the Supreme Court to decide?
He says the Eighth Circuit wrongly treated age 18 as a strict cutoff for intellectual disability in a death-penalty case. He also says prosecutors should not use testimonial hearsay at federal capital sentencing.
Who could be affected if the Court agrees to hear and later sides with Coonce?
Federal capital defendants with low IQ scores and major adaptive deficits could gain a stronger path to avoid execution. Sentencing juries could face tighter limits on uncross-examined testimonial evidence.
What should court watchers look for next in Coonce v. United States?
Watch for oral argument or another scheduling move from the Supreme Court. No decision window is available yet.
Decision
What the Court decided
Before any argument, the case asks whether federal death-penalty law gives enough protection to a defendant whose intellectual disability allegedly began after age 18 and whether confrontation rights apply when a jury chooses a death sentence.
Impact
The case could affect federal capital defendants who have low IQ scores and serious adaptive deficits but cannot prove those problems began before age 18. It could also determine whether a jury deciding between life and death may hear testimonial statements from witnesses who are not cross-examined.
Not official Court text.
Opinion documents
Timing
Decided November 1, 2021
The Court released its decision on November 1, 2021 without hearing oral argument.
Documents
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 2, 2026
- Method
- Methodology