SCOTUS Slams the Backdoor on Post-Conviction Relief: First Step Act and AEDPA Rulings Demand a New Defense Playbook

Finality Over Fairness: The First Step Act Gets Gutted

For the past few years, federal criminal defense attorneys have effectively used the compassionate release provision of the First Step Act as a vital equitable tool. When Congress declined to make certain sentencing reforms retroactive, creative practitioners turned to 18 U.S.C. § 3582(c)(1)(A), arguing that the massive disparity between a client’s draconian legacy sentence and the much lighter sentence they would receive today constituted an "extraordinary and compelling reason" for early release. District court judges, recognizing the inherent unfairness of these disparities, frequently agreed.

As of May 28, 2026, that door has been slammed shut. In a 6–3 decision stemming from two consolidated Pennsylvania cases, the Supreme Court explicitly held that federal judges cannot grant early release under the First Step Act merely because a prisoner would receive a shorter sentence if sentenced today. Furthermore, the Court ruled that inmates cannot use the compassionate-release provision to challenge uncertainty surrounding the underlying validity of their convictions.

For practicing lawyers, the takeaway is immediate and severe: Stop relying on non-retroactive legislative changes to win compassionate release. The conservative majority has signaled a strict, textualist approach to post-conviction relief that prioritizes absolute finality over evolving standards of sentencing fairness. If you are drafting a § 3582 motion today, you must pivot back to the traditional, narrow grounds: terminal medical conditions, advanced age coupled with deterioration, or the death of a minor child’s sole caregiver. Attempting to use the First Step Act as a substitute for a 28 U.S.C. § 2255 habeas petition to attack a conviction’s validity will now be dead on arrival.

The Etan Patz Reversal: Reinforcing the AEDPA Fortress

If the First Step Act ruling was a warning shot regarding federal sentences, the Court’s June 22, 2026 decision in the Etan Patz murder case was a direct hit on federal habeas relief for state prisoners. By reinstating the 2017 state conviction, the Supreme Court benchslapped the Second Circuit for overstepping its bounds, ruling that the appellate court violated the strict limits Congress placed on federal habeas relief.

This ruling is a textbook application of the Antiterrorism and Effective Death Penalty Act of 1996 (AEDPA). Under 28 U.S.C. § 2254(d), a federal court cannot grant habeas relief to a state prisoner unless the state court's adjudication was "contrary to, or involved an unreasonable application of, clearly established Federal law." The Second Circuit attempted to bypass this highly deferential standard to correct what it viewed as a fatal flaw in the Patz conviction. The Supreme Court's reversal is a stark reminder to the defense bar: federal courts are not courts of equitable error-correction for state trials. Unless you can point to a state court decision that is objectively unreasonable—not just wrong, but beyond the pale of fair-minded disagreement—the federal courthouse doors are locked.

"The through-line of the 2026 term is unmistakable: The Supreme Court is aggressively policing lower courts that attempt to find equitable workarounds to rigid statutory limitations on post-conviction relief."

A Pivot in Practice: Move from Equity to Structure

So, where does the defense bar go from here? With equitable sentencing appeals and federal habeas relief heavily restricted, the most viable path forward lies in structural and procedural challenges. And a massive circuit split is currently teeing up one of the best structural defenses of the year.

On September 9, 2026, the Trump administration petitioned the Supreme Court to intervene after the Ninth Circuit ruled that Sigal Chattah was not validly appointed as Nevada’s acting U.S. Attorney. This is not an isolated incident; the Second and Third Circuits have issued similar rulings invalidating the appointments of other interim U.S. Attorneys.

This is where defense lawyers need to focus their energy. If the top federal prosecutor in your district was invalidly appointed under the Federal Vacancies Reform Act or the Appointments Clause, every indictment signed, wiretap authorized, and plea agreement negotiated under their authority is potentially fruit of a poisonous tree. While the Supreme Court's supercharged shadow docket (which, as Reuters reported in July, is increasingly being used to shape federal law without full merits briefing) may eventually resolve this circuit split, right now it is a live, potent weapon.

The Post-Bruen Frontier

Finally, we cannot ignore the ongoing fallout from New York State Rifle & Pistol Ass'n, Inc. v. Bruen, 597 U.S. 1 (2022). On June 26, the Court signaled a continued expansion of Second Amendment litigation by taking up a slate of new gun cases, most notably challenges to the federal law barring illegal drug users from possessing firearms (18 U.S.C. § 922(g)(3)).

For defense attorneys handling federal gun possession charges, the mandate is clear: preserve your Second Amendment challenges on the record. The Court is actively dismantling the historical foundations of § 922(g) prohibitions. If your client is charged as an unlawful drug user in possession of a firearm, a motion to dismiss based on the unconstitutionality of the statute is now a baseline requirement for effective assistance of counsel.

The Bottom Line: The 2026 legal landscape requires a ruthlessly technical approach to criminal defense. The Supreme Court has stripped away the equitable safety nets of the First Step Act and federal habeas review. To win, practitioners must abandon appeals to fairness and instead attack the structural validity of the prosecution and the constitutional foundations of the underlying criminal statutes.