Stone v. Powell Forecloses § 2255 Fourth Amendment Relitigation Absent a Debatable Brady/IAC Showing; “Blanket Suppression” Demands Foster-Level Flagrant Disregard

I. Introduction

In United States v. Hahn (10th Cir. May 19, 2026), federal prisoner Marcus Hahn sought a certificate of appealability (COA) to challenge the denial of his amended 28 U.S.C. § 2255 motion. The case’s long procedural arc began with Hahn’s 2000 multi-count conviction involving marijuana offenses and two 18 U.S.C. § 924(c) firearm counts. After one § 924(c) conviction was later vacated via a § 2241 proceeding in the Fourth Circuit (Hahn v. Moseley), Hahn was resentenced in New Mexico under the “sentencing package” doctrine, dramatically reducing his sentence.

In this § 2255 proceeding, Hahn pursued five claims, but on appeal sought a COA only on a Fourth Amendment theory: that a 1999 search warrant for marijuana/firearms was allegedly used as a pretext for a homicide investigation and executed as an unlawful “general search,” requiring suppression of all evidence. The central legal questions were: (1) whether Stone v. Powell barred the Fourth Amendment relitigation in § 2255, and (2) whether alleged Brady suppression or ineffective assistance undermined Hahn’s prior “full and fair opportunity” to litigate suppression so as to avoid the Stone bar. Hahn also challenged the district court’s refusal to expand the record and to hold an evidentiary hearing.

II. Summary of the Opinion

The Tenth Circuit denied a COA and dismissed the appeal. Applying Slack v. McDaniel, the court concluded reasonable jurists would not debate the district court’s dispositive procedural/merits determinations. Most importantly, the panel held Hahn could not overcome the Stone v. Powell bar because he failed to show a debatable Brady v. Maryland violation or a debatable Strickland v. Washington ineffective-assistance claim connected to suppression litigation.

Even assuming (without deciding) that Brady applies at suppression hearings—an open question in the circuit per United States v. Muhtorov—the panel held Hahn failed the Brady materiality requirement. The purportedly withheld “January 2000” warrant affidavit narrative might have supported an ulterior-motive theory, but it was not reasonably likely to change the suppression outcome, particularly given the “extraordinary case” threshold for “blanket suppression” discussed in United States v. Foster.

The court also rejected Hahn’s attacks on the district court’s management of the § 2255 record and procedure, finding no abuse of discretion in denying a late motion to expand the record and no entitlement to an evidentiary hearing because the files and records conclusively showed he was not entitled to relief.

III. Analysis

A. Precedents Cited and Their Role

1. Gatekeeping the Appeal: COA Standards

  • Slack v. McDaniel: Provides the COA framework. When a claim is denied on procedural grounds, an applicant must show reasonable jurists could debate both (i) the procedural ruling and (ii) the underlying constitutional claim. The panel used Slack to deny a COA because Hahn’s underlying Brady/IAC theories were not reasonably debatable.
  • Davis v. Roberts: Permits the court to deny a COA on any ground supported by the record, even if not relied upon below. This allowed the panel to sidestep timeliness complexities and deny on stronger, record-supported barriers (notably Stone/merits).
  • James v. Wadas: Supplies the rule for construing pro se filings liberally without acting as an advocate. The panel cited it to frame Hahn’s pro se posture while still enforcing waiver and substantive standards.

2. The Central Barrier: Stone v. Powell in § 2255

  • Stone v. Powell: Bars federal habeas relief on Fourth Amendment exclusionary-rule claims where the prisoner had an “opportunity for full and fair litigation” of that Fourth Amendment issue. The panel treated Stone as dispositive because Hahn litigated suppression pretrial with a hearing.
  • United States v. Lee Vang Lor: Confirms Stone’s bar applies in § 2255 proceedings (not only § 2254). This precedent anchored the court’s ability to apply Stone in a federal-prisoner collateral attack.

3. Attempted “Escape Hatches”: Brady and Ineffective Assistance

  • Brady v. Maryland: Hahn argued the government suppressed a state-court-sealed homicide warrant affidavit that would have supported his “pretextual general search” theory.
  • United States v. Muhtorov: The panel emphasized Brady’s application to suppression hearings is unresolved in the Tenth Circuit and noted the circuit has “hinted the answer is no.” Still, it assumed Brady’s applicability arguendo and denied on Brady’s elements—especially materiality.
  • Fontenot v. Crow: Cited for the burden of proof on Brady elements (preponderance). Reinforced that Hahn bore the evidentiary and persuasive burden.
  • Smith v. Sec'y of New Mexico Dep't of Corr.: Hahn invoked Smith’s broad definition of “prosecution” (including law enforcement and other state arms) to impute knowledge for Brady. The panel found Hahn failed to connect the state-court unsealing fight to federal suppression duties in a way that created a debatable Brady claim.
  • United States v. Beers: Hahn relied on Beers’ discussion of joint federal-state investigations and possible Brady disclosure implications. The panel noted Beers reserved the issue and, in any event, Hahn’s “joint operations” theory was likely not properly preserved.
  • United States v. Garfinkle: Deems new theories raised for the first time in objections to a magistrate judge’s report waived. This doctrine supported rejecting Hahn’s belatedly developed “joint operations” Brady theory and his underdeveloped appellate-IAC claim.
  • United States v. Brooks: Provided the Brady materiality formulation (“reasonable probability” of a different result), which the panel used to hold Hahn did not show the affidavit would likely change the suppression ruling.
  • Strickland v. Washington: The governing two-prong standard for ineffective assistance (deficiency and prejudice). Hahn’s IAC arguments failed mainly on the prejudice prong because the sought-after blanket suppression was speculative.

4. Suppression Doctrine: “Pretextual General Search” and Blanket Suppression

  • United States v. Foster: The key analogue for Hahn’s theory. Foster recognizes blanket suppression where officers execute a warrant in “flagrant disregard” of its terms, but warns it is an “extreme remedy” reserved for “the most extraordinary of cases.” The panel distinguished Hahn’s showing from Foster: an affidavit suggesting ulterior motive does not establish the kind of warrant-execution lawlessness that triggers blanket suppression.

5. Magistrate Review, Record Expansion, and Hearings

  • Northington v. Marin and Kellogg v. Watts Guerra LLP: Used to reject Hahn’s claim the district court failed to conduct de novo review of objections. The panel treated the district court’s statement of de novo review as sufficient.
  • Eckstein v. Kingston and Doe v. Chao: Support discretionary control over record expansion (Rule 7) and whether to accept late evidence after a magistrate judge’s recommendation.
  • United States v. Kirby: Supplies the abuse-of-discretion standard articulation used to uphold the denial of record expansion.
  • United States v. Moya: Confirms denial of an evidentiary hearing in § 2255 is reviewed for abuse of discretion; applied to affirm the district court’s decision that the record conclusively defeated relief.

6. Background Sentencing Framework (Context)

  • Hahn v. Moseley: The Fourth Circuit decision that vacated Hahn’s Count 4 § 924(c) conviction and instructed relief, precipitating resentencing.
  • United States v. Jackson: Cited for the “sentencing package” doctrine permitting de novo resentencing on remaining counts after a count is vacated unless the vacating court limits that authority.
  • United States v. Hahn (2002) and United States v. Hahn (2006): Prior Tenth Circuit proceedings affirming Hahn’s conviction/sentence and rejecting earlier § 2255 efforts.

B. The Court’s Legal Reasoning

1. The Court Prioritized Dispositive Barriers Over Timeliness Complexity

The district court found Hahn’s conviction-related claims untimely despite the 2020 amended judgment, but the Tenth Circuit declined to resolve whether that timeliness ruling was debatable. Relying on Slack v. McDaniel and Davis v. Roberts, the panel denied a COA on alternative grounds: Hahn could not establish a debatable constitutional claim sufficient to bypass the Stone v. Powell limitation on Fourth Amendment habeas litigation.

2. Stone v. Powell: “Opportunity” Was Provided

Hahn had litigated suppression pretrial and received a hearing. That procedural history satisfied Stone’s “opportunity for full and fair litigation,” shifting Hahn’s burden to show why that opportunity was constitutionally undermined (his Brady and IAC theories).

3. Brady Theory Failed on Preservation and (More Critically) Materiality

The panel questioned whether Hahn preserved his “joint operations” Brady theory because it was not clearly articulated in the amended § 2255 motion and was developed only in objections, triggering waiver under United States v. Garfinkle. But even putting preservation aside, the panel’s core holding was that Hahn could not show Brady materiality under United States v. Brooks.

The purported affidavit might have suggested a homicide-investigation motive, but the requested remedy was sweeping: suppression of all evidence from the 1999 warrant as a “pretextual general search.” Under United States v. Foster, such blanket suppression is reserved for extraordinary, flagrant-disregard executions of a warrant. The panel held Hahn’s showing did not plausibly approach that threshold; ulterior motive alone would not likely produce the “extraordinary case” finding needed for blanket suppression.

4. Ineffective Assistance Failed Mainly on Prejudice

Both trial- and appellate-counsel IAC arguments failed because Hahn could not show a reasonable probability of a different suppression outcome. Without a viable path to blanket suppression under United States v. Foster, Hahn could not establish the required Strickland v. Washington prejudice. The panel also accepted waiver reasoning for appellate-IAC development raised too late or too cursorily.

5. Procedural Management: No Abuse of Discretion

The court upheld the denial of a late motion to expand the record because the district court had already granted one expansion request and reasonably concluded Hahn did not show diligence or likely effect on the outcome. It also upheld the denial of an evidentiary hearing under § 2255(b) because the existing record conclusively showed Hahn was not entitled to relief.

C. Impact

Although the order is nonprecedential, its reasoning reflects several practical, future-facing constraints in § 2255 litigation in the Tenth Circuit:

  • Stone remains a high wall: Fourth Amendment suppression claims generally cannot be relitigated via § 2255 when a defendant had a suppression hearing, unless the applicant can make a debatable showing that the opportunity was fundamentally compromised (e.g., by a material Brady violation or prejudicial ineffective assistance).
  • Brady-to-suppression remains unsettled: Citing United States v. Muhtorov, the court again highlighted that Brady’s applicability at suppression hearings is unresolved and may be disfavored—encouraging litigants to expect skepticism and to focus on materiality.
  • Blanket suppression is exceptionally rare: By leaning on United States v. Foster, the order underscores that claims of pretext must connect to concrete, flagrant overreach in execution—not merely to alleged ulterior motives.
  • Preservation rules matter in postconviction practice: The use of United States v. Garfinkle reinforces that new theories raised at the objection stage are vulnerable to waiver, limiting the ability to “retool” a § 2255 claim after an adverse magistrate recommendation.
  • District courts retain tight control over the postconviction record: The abuse-of-discretion framing (e.g., United States v. Kirby) signals deference to district judges on record expansion and hearings, particularly where additional materials appear late and unlikely to change the result.

IV. Complex Concepts Simplified

Certificate of Appealability (COA)
A screening requirement for appealing the denial of § 2255 relief. Under Slack v. McDaniel, the applicant must show reasonable jurists could debate the ruling (and, if procedural, both the procedure and the merits).
Stone v. Powell “full and fair opportunity” bar
If a defendant had a real chance to litigate a Fourth Amendment claim (typically via a suppression motion and hearing), federal collateral review generally will not revisit whether evidence should have been suppressed.
Brady v. Maryland
Requires disclosure of favorable, material evidence the prosecution suppresses. “Material” means a reasonable probability the result would have changed. Here, even assuming Brady applies to suppression hearings, the court found the alleged material would not likely have produced blanket suppression.
“Pretextual general search” / “blanket suppression”
A claim that officers used a warrant as cover for an impermissibly broad, exploratory search. Under United States v. Foster, suppressing all seized evidence is an extreme remedy reserved for extraordinary cases involving flagrant disregard for the warrant’s limits.
Ineffective assistance (Strickland)
Requires showing both unreasonable attorney performance and prejudice—i.e., a reasonable probability of a different outcome. Speculation that additional evidence might have supported an extraordinary remedy is typically insufficient.
Waiver for late-raised theories
Under United States v. Garfinkle, new legal theories introduced only in objections to a magistrate judge’s recommendation are generally treated as waived.
Sentencing package doctrine
When one count in a multi-count case is vacated, the district court may often resentence on remaining counts as a package. The opinion referenced this doctrine via United States v. Jackson to explain the 2020 resentencing context.

V. Conclusion

United States v. Hahn reinforces the practical dominance of Stone v. Powell in § 2255 proceedings: where a defendant previously litigated suppression, collateral review will not reopen Fourth Amendment exclusion issues unless the applicant can present a debatable, outcome-changing constitutional defect in that earlier opportunity. The court’s treatment of Hahn’s Brady and ineffective-assistance theories underscores two decisive constraints: (1) materiality/prejudice must be concrete, not speculative, and (2) blanket suppression is reserved for extraordinary Foster-like facts demonstrating flagrant disregard for the warrant’s limits. Finally, the order highlights the importance of timely theory development and confirms broad district-court discretion over record expansion and evidentiary hearings in postconviction litigation.