TL;DR:
The Supreme Court on May 21, 2026 dismissed the certiorari petition in Hamm v. Smith, leaving intact the Eleventh Circuit’s holistic approach to evaluating multiple IQ scores in Atkins-type intellectual disability claims. The decision does not establish a new universal rule for weighing IQ test results; instead, it leaves Alabama’s traditional, holistic framework in place and signals that the Court is not prepared to resolve the aggregation question at this time. For trial teams, the takeaway is to continue developing a robust evidentiary record on intellectual functioning, adaptive deficits, and early-life indicators, particularly in capital cases, while anticipating that lower courts will apply a case-specific, fact-driven analysis rather than a rigid cutoff. Practical steps include preparing multiple credible neuropsychological assessments, documenting adaptive functioning across domains, and shaping voir dire, mitigation presentation, and post-conviction strategy around a holistic disability inquiry rather than a single score.
background
The Hamm v. Smith dispute arose from a capital case in which the defendant presented evidence of intellectual disability to avoid execution. Since Atkins v. Virginia, 536 U.S. 304 (2002), states have balanced IQ scores with additional evidence—such as adaptive functioning, schooling history, and behavioral records—to determine whether an individual qualifies as intellectually disabled. Alabama’s framework, shaped by state practice and decisions, does not rely on a single IQ score to decide a claim; instead, it calls for a comprehensive, preponderance-of-evidence inquiry into whether significant subaverage intellectual functioning and adaptive deficits were present before age 18. The core legal question in Hamm was whether the Supreme Court should address how courts should weigh multiple IQ scores when evaluating an Atkins claim. The case had previously drawn attention to whether a “one-low-score” approach or a holistic assessment should govern the analysis.
what the decision says
On May 21, 2026, the Supreme Court issued a per curiam order dismissing the petition for certiorari as improvidently granted. In practical terms, the Court did not resolve the underlying methodological question of aggregating multiple IQ scores across tests or provide a nationwide rule for Atkins claims. Justice Sonia Sotomayor wrote a separate concurring opinion to emphasize that the Court’s dismissal should not be read as endorsing any particular method for weighing multiple IQ scores, and to caution against drawing broad doctrinal conclusions from the case. The Court’s action leaves in place the Eleventh Circuit’s analysis and results, which treated the aggregate record through a holistic lens rather than mandating a fixed threshold or single-score cutoff. (law.cornell.edu)
Practical implications for trial teams
- No new Supreme Court standard yet: The dismissal means practitioners should not count on a bright-line, Supreme Court-driven rule for aggregating IQ scores in Atkins claims. Trial teams must continue to rely on state-law approaches and holistic examinations of intellectual functioning and adaptive deficits, as guided by precedent in the relevant circuit. The concurrence reinforces that the decision was not intended to settle the aggregate- IQ-score question, leaving lower courts to apply their own frameworks. (law.cornell.edu)
- Holistic, evidence-based mitigation remains essential: Because multiple IQ scores can hover around the 70 threshold, capital-defense teams should emphasize a broad mitigation record beyond IQ, including adaptive functioning, educational history, early-life impairment, social and occupational functioning, and expert testimony. Courts will continue to evaluate how these pieces fit together under Atkins, rather than relying on a single metric. (law.cornell.edu)
- Voir dire and trial strategy: In capital contexts or any case where intellectual disability could influence sentencing, counsel should prepare to present a multi-faceted disability narrative. This includes ensuring defense experts can discuss standard errors of measurement, cross-test consistency, and the relevance of adaptive deficits across domains such as communication, daily living skills, and social responsibility. Align voir dire and mitigation presentation to the holistic framework rather than a supposed numeric cutoff. (law.cornell.edu)
- Post-conviction planning: The decision underscores the importance of preserving comprehensive records for potential post-conviction review. Since the Court did not resolve aggregation methodology, effective preservation of IQ testing histories, neuropsychological evaluations, and corroborating adaptive-behavior evidence will be crucial for any future federal habeas or state post-conviction proceedings. (law.cornell.edu)
How to translate this into courtroom practice now
- Build a robust disability record: Collect and coordinate multiple IQ assessments from independent neuropsychologists, with explicit attention to standard errors of measurement and confidence intervals. Ensure reports address how scores interact with adaptive functioning and developmental history. (law.cornell.edu)
- Emphasize adaptive functioning and development: Incorporate evidence of lifelong learning, daily living skills, social interactions, and early educational placement. These factors often carry decisive weight when tailored to the operative standard in the jurisdiction and can complement IQ data in a holistic analysis. (law.cornell.edu)
- Prepare for cross-examination and rebuttal: Anticipate challenges to the reliability or interpretation of multiple IQ scores and develop robust lines of cross-examination and expert testimony to articulate why a holistic approach remains warranted in Atkins claims. (law.cornell.edu)
- Align appellate strategy with current posture: Given the Court’s dismissal without ruling on aggregation, appellate teams should frame arguments around how the trial record reflects a holistic evaluation consistent with existing Atkins jurisprudence, and how any future aggregation framework would affect state practice and due process considerations. (law.cornell.edu)
Takeaways for trial teams in the current year
- The Hamm v. Smith outcome does not negate the relevance of IQ scores in Atkins claims, but it does reaffirm that no universal, Supreme Court–mandated rule governs how multiple scores should be weighed. Practitioners should continue to develop comprehensive mitigation packets and work with experienced neuropsychologists to craft a narrative that integrates IQ data with adaptive functioning and developmental history. This approach aligns with the Eleventh Circuit’s, and now the Court’s, cautious stance on creating rigid federal standards in this area. (law.cornell.edu)
- As capital case litigation remains deeply fact-intensive, the Holistic Approach remains the best-practice framework. Trial teams should remain vigilant for any future circuit-specific or state-law developments that may refine the Atkins standard, and be ready to adjust strategy as new precedents emerge.
sources
- Hamm v. Smith, 608 U.S. ___ (2026) (May 21, 2026), per curiam with concurrent commentary by Justice Sotomayor. (law.cornell.edu)
- Supreme Court Table of Contents, Most Recent Decisions (May 2026) including Hamm v. Smith and related Atkins cases. (law.cornell.edu)
- AP News coverage of the Hamm v. Smith decision and its practical implications for death penalty litigation. (apnews.com)
- Justia Supreme Court Center overview of Hamm v. Smith, decision date and context. (supreme.justia.com)
- Official Supreme Court site and policy notes for decision date and docket context. (supremecourt.gov)
Note: This timely development is a current-vs-historic item that directly informs capital-litigations strategy. It is a concrete action that impacts trial and post-conviction work, with a fresh, authoritative source trail from Supreme Court materials and major press coverage.