Background
In 1979, six-year-old Etan Patz disappeared near his lower Manhattan home after stopping at a bodega where 18-year-old Pedro Hernandez worked. The case went cold for decades until 2012, when Hernandez’s brother-in-law reported that Hernandez had confessed to family members. Detectives questioned Hernandez at the Camden County Prosecutor’s Office before administering Miranda warnings, during which Hernandez — a man with a low IQ and history of mental illness — confessed to strangling Patz. Detectives then read Hernandez his Miranda rights; he waived them and gave two additional videotaped confessions, one to detectives and one to an assistant district attorney. Hernandez continued to confess repeatedly while in pretrial custody, including to two psychiatrists.
At Hernandez’s second trial in 2016 (the first having ended in a hung jury), the trial court denied suppression of the confessions, finding Hernandez was not in custody before his Miranda warning and that he had knowingly and voluntarily waived his rights thereafter. During deliberations, the jury sent a note asking whether, if they found the pre-Miranda confession involuntary, they must also disregard all subsequent confessions. The trial court answered “no,” explaining that under New York law attenuation is not a question for the jury. Hernandez was convicted of kidnapping and felony murder and sentenced to 25-years-to-life. New York’s Appellate Division affirmed, and the New York Court of Appeals denied leave to appeal.
Hernandez then sought federal habeas relief, arguing that the trial court’s “no” response to the jury note violated clearly established federal law under Missouri v. Seibert, 542 U.S. 600 (2004), which addressed the admissibility of confessions obtained through a deliberate two-step interrogation strategy. The federal District Court denied relief on the merits, finding the response technically correct and any error harmless. The Second Circuit reversed, holding that Justice Kennedy’s Seibert concurrence established a binding rule applicable not only to suppression rulings by judges but also to jury determinations, and that the trial court’s answer was “manifestly inaccurate” and prejudicial.
The Court’s Holding
The Supreme Court reversed per curiam, holding that the Second Circuit exceeded the authority AEDPA confers on federal habeas courts. The Court identified three independent reasons why no clearly established federal law required the trial court to instruct the jury on Seibert attenuation. First, the Federal Constitution does not require both judge and jury to pass on the admissibility or voluntariness of evidence — under Lego v. Twomey, 404 U.S. 477 (1972), that is a judicial function, not a jury function. Second, even assuming Justice Kennedy’s Seibert concurrence states a binding rule under Marks v. United States, 430 U.S. 188 (1977), Seibert addressed only a trial court’s ruling on a suppression motion; the Court has never applied it to a jury’s assessment of attenuation, and no Supreme Court precedent does so. Third, no due process precedent requires a trial court to explain to a jury an issue the jury is not required to decide.
The Court also rejected Hernandez’s argument that because New York law vested juries with responsibility to assess voluntariness, Seibert must control the jury’s analysis. The trial court and Appellate Division had both ruled that New York law does not require juries to assess attenuation — a state-law determination that a federal habeas court cannot second-guess under Estelle v. McGuire, 502 U.S. 62 (1991). The Court noted that Hernandez himself conceded he was not entitled to a freestanding jury instruction on attenuation under New York law, and that the contingent facts that the jury happened to ask about the issue could not transform Seibert’s discussion of suppression into clearly established federal law governing jury deliberations.
Key Takeaways
- AEDPA permits federal habeas relief only when a state-court decision contradicts or unreasonably applies a holding of the Supreme Court — not when it conflicts with a principle that lower federal courts have extrapolated from that holding into a new procedural context.
- Missouri v. Seibert addresses a trial judge’s suppression ruling on a two-step Miranda interrogation; the Supreme Court has never extended Seibert to govern jury instructions on attenuation, and the Second Circuit erred in treating it as clearly established law in that context.
- The Federal Constitution does not require juries to evaluate the lawfulness of confessions that a court has admitted; the admissibility determination belongs to the court under Lego v. Twomey.
- Federal habeas courts may not second-guess a state court’s interpretation of its own procedural law, even when a jury asks a question that implicates that law during deliberations.
- Three Justices — Sotomayor, Kagan, and Jackson — would have denied certiorari.
Why It Matters
This decision reinforces the Supreme Court’s consistent message that lower federal courts must apply AEDPA’s “clearly established federal law” standard strictly, confining habeas relief to actual Supreme Court holdings rather than logical extensions of those holdings into novel procedural settings. The Court’s summary reversal — the second such reversal in quick succession following Klein v. Martin, 607 U.S. 213 (2026) — signals ongoing concern that some circuits are substituting their own judgment for that of state courts in ways AEDPA was designed to prevent.
For practitioners, the decision clarifies that Seibert’s two-step interrogation doctrine operates at the suppression stage before an admissibility ruling, not as a continuing constraint on jury deliberations after a court has admitted a confession. Defense counsel in states that, like New York, give juries a voluntariness instruction cannot rely on Seibert as a federal constitutional basis to demand a companion attenuation charge — the question whether juries may even consider attenuation remains one of state procedural law, insulated from federal habeas review.