Two Supreme Court habeas cases test access to federal review after November arguments

The Supreme Court heard Maxwell v. Dinis on November 2, 2026, and Guerrero v. Johnson on November 4. Both concern access to federal habeas review, through which prisoners challenge the legality of their custody. The Court’s Maxwell docket and Guerrero docket, checked November 12, record argument but no decision.

This explainer describes the competing written positions. Our separate Maxwell argument report and Guerrero argument report cover the hearings. The question in Maxwell is whether a federal prisoner can use habeas to seek an earlier move to a halfway house or home confinement. Guerrero concerns the narrower statutory conditions for a state prisoner’s second federal petition.

The government takes different positions. It agrees that the lower court used the wrong habeas rule in Maxwell, while arguing that other barriers still defeat his claim. In Guerrero, it supports Texas’s argument that later medical standards do not make an old constitutional rule newly available.

Maxwell v. Dinis: what the prisoner says he is owed#

William Maxwell is serving a 20-year federal sentence at a low-security prison in Beaumont, Texas, for his role in a scheme to take over a mortgage-loan company and use its assets, according to his opening brief. The brief says he was convicted in 2014, sentenced in 2015, has had no disciplinary infractions, holds the lowest recidivism-risk rating, and has worked as a cook and a prison law clerk, activities that can earn credits under the First Step Act. SCOTUSblog's preview says the 2007 scheme took more than $14 million from FirstPlus Financial Group.

The First Step Act, passed by large bipartisan majorities and signed by President Donald Trump in December 2018, lets eligible federal prisoners earn time credits for completing recidivism-reduction programs and other "productive activities." Subject to the law’s eligibility and transfer conditions, the statute says the Bureau "shall transfer" him into prerelease custody, meaning a halfway house or home confinement, or into supervised release.

Maxwell filed a habeas petition under 28 U.S.C. 2241 in February 2022, arguing that the Bureau had failed to count some of his work and that he was owed "between 42 and 48 months" of credits. A magistrate judge recommended dismissal because he had not exhausted the prison system's internal grievance process, and the district court agreed. The 5th U.S. Circuit Court of Appeals affirmed on a different ground that neither the government nor the district court had raised: under a circuit "bright-line rule," habeas is available only for claims that would "automatically entitle" a prisoner to accelerated release, and a move to a halfway house is not release. The panel said Maxwell's claim belonged, if anywhere, in a civil-rights suit under Bivens.

The case may have limited practical stakes for Maxwell himself. The Solicitor General's brief reports that a Bureau assessment completed July 25, 2026, credits him with 1,275 days of First Step Act time and projects, contingent on good behavior, that he becomes eligible for a halfway house on Jan. 22, 2027.

The three positions before the Court#

The Court granted review in June on a question it wrote itself: whether a claim about First Step Act credits "seeking accelerated transfer to a halfway house or home confinement" can be brought in a habeas petition under Section 2241, according to the docket. Because the government declined to defend the 5th Circuit's reasoning, the justices appointed Brian W. Barnes of the firm Cooper & Kirk to argue in support of the judgment below. That produces three distinct positions rather than two.

Maxwell's argument. His lawyers at Davis Polk & Wardwell argue that text, history and precedent all allow habeas claims that seek a lower "level of custody," not only total freedom. They point to Section 2243, which tells courts to "dispose of the matter as law and justice require," and to common-law practice in which courts released prisoners on bail rather than discharging them outright. Their central precedent is Preiser v. Rodriguez (1973), in which the Court held that state prisoners seeking restored good-time credits had to use habeas, not a civil-rights suit. They also argue that without habeas there may be no remedy at all: Bivens suits are sharply limited, and other routes such as the Administrative Procedure Act face statutory bars.

The government's argument. The Solicitor General's office, led by D. John Sauer, agrees that a claim alleging "unlawfully prolonged imprisonment" and seeking a speedier transfer out of prison is cognizable in habeas, and calls the 5th Circuit "plainly wrong" to suggest Bivens as the vehicle. But it says Maxwell should still lose for two reasons. First, the district court found he had not exhausted administrative remedies. Second, and in the government's words "of greater systemic importance," the First Step Act itself added a sentence to 18 U.S.C. 3621(b): "Notwithstanding any other provision of law, a designation of a place of imprisonment under this subsection is not reviewable by any court." The government reads that sentence to cover a decision to keep a prisoner in prison rather than a halfway house. It asks the Court to vacate and remand, or alternatively to dismiss the case as improvidently granted because Maxwell "will likely be transferred to a halfway house within months in any event." The government's footnote acknowledges that it did not raise the review bar in its 5th Circuit letter brief or its opposition to certiorari.

The court-appointed amicus's argument. Barnes's brief defends the result below on narrower terms than the 5th Circuit used. It says habeas covers claims to shorten or end physical detention, claims for earlier release on bail or parole, and claims that a prisoner is held somewhere the sentencing court lacked jurisdiction to send him. A transfer to prerelease custody, in this view, is a continued form of Bureau-controlled detention, "materially different" from parole, which in the federal system has been replaced by court-supervised release. Barnes argues that Maxwell's "level of custody" test would require a "very fact-intensive inquiry," and that the government's test "begs the answer to the very question this Court faces." Conditions-of-confinement claims, he writes, should be handled the way courts already handle other federal prisoners' complaints about their conditions.

Who filed in support of Maxwell#

Several amicus briefs back Maxwell's position, and some come from legislators who worked on the 2018 law. Senators Dick Durbin of Illinois and Cory Booker of New Jersey, both Democrats, filed a brief describing the Act as "a historic and bipartisan piece of legislation" and arguing that the credits system "imposes a mandatory obligation" on the Bureau. They assert that program participants "reoffend at markedly lower rates" and that community-based custody is cheaper than prison; the brief offers those as the senators' arguments, and we did not independently test the recidivism figures it relies on. The brief quotes 2018 floor statements by Sen. Chuck Grassley, an Iowa Republican, who is not a signer.$$$

Rep. Jamie Raskin of Maryland, the ranking Democrat on the House Judiciary Committee, filed a separate brief arguing that Congress "rejected proposals that would have allowed BOP discretion to veto a prisoner's transfer" and instead wrote mandatory language. Criminal-defense groups, the sentencing-reform group FAMM and a group of habeas scholars also filed in support of Maxwell, according to the docket. We found no amicus brief from a Republican member of Congress on either side; the main arguments for a narrower reading come from the government and the court-appointed amicus.$

For readers weighing the lawmakers' involvement: the 567 Politics funding snapshots for the 2026 cycle, retrieved on November 10 for Raskin and November 12 for Booker and Durbin, cover only receipts from registered committees, not individual donors, and do not net refunds. In those snapshots, Raskin's committee reported $10,000 from the American Association for Justice PAC, a trial lawyers' group, and Booker's reported $5,000 from the same PAC (FEC: Raskin; FEC: Booker). That group is not a party or amicus in this case. These figures describe the saved FEC-derived snapshots; the linked filing images could not be reopened during this update, so individual transactions and amendments were not independently rechecked. They do not establish a financial connection to this litigation or show why a member takes a legal position.

Guerrero v. Johnson: when is an old rule "previously unavailable"?#

The Guerrero case arises from a 2006 crime. Dexter Johnson was convicted in 2007 of capital murder for the killing of Maria Aparece, a 23-year-old college student, and was sentenced to death. Her boyfriend, Huy Ngo, was also killed. Texas's brief, filed by the office of Attorney General Ken Paxton, recounts the crime and says Johnson participated in three other killings during the same period. Johnson's lawyers do not contest the conviction in this proceeding; the dispute is about his death sentence.

In Atkins v. Virginia (2002), the Court held that the Eighth Amendment bars executing people with intellectual disabilities. At Johnson's trial, a defense expert measured his IQ between 74 and 88 and testified that he was not intellectually disabled under the standards then in use. Johnson did not raise an Atkins claim in his first state or federal habeas petitions. In May 2013, the American Psychiatric Association published the DSM-5, which de-emphasized fixed IQ cutoffs in favor of adaptive functioning, and Texas's highest criminal court adopted it in 2018 after the Supreme Court's ruling in Moore v. Texas. In 2019, one expert measured Johnson's IQ at 70 and diagnosed mild intellectual disability; a second expert agreed. Texas submitted an affidavit from a third psychologist calling that methodology "invalid and unreliable."

The Antiterrorism and Effective Death Penalty Act of 1996 bars most second federal habeas petitions. One exception is for a claim that "relies on a new rule of constitutional law, made retroactive to cases on collateral review by the Supreme Court, that was previously unavailable." The 5th Circuit, applying its 2017 decision In re Cathey, held that a claim with no possibility of merit when the first petition was filed was "previously unavailable," and let Johnson proceed. The full court declined to rehear the case by a 9-7 vote; Judge James Ho, dissenting, wrote that "Atkins isn't a new rule of constitutional law. It's a decades old decision."

Texas's argument. The state says the statute asks whether the rule was previously unavailable, not whether a claim would have succeeded. Atkins was decided four years before Johnson's crime. A claim based on new psychiatric evidence is a claim of new facts, the state argues, and the separate new-facts exception applies only to evidence of innocence of the underlying offense, which Johnson does not assert. The state also invokes finality and respect for state courts, quoting the Court's statement that reexamining state convictions "frustrates both the States' sovereign power to punish offenders and their good-faith attempts to honor constitutional rights." SCOTUSblog reports that the state's brief compares the rule to a hammer a carpenter has "available" even when he does not need it.

The federal government's argument. The Solicitor General filed an amicus brief supporting Texas. It says the exception is "not an invitation for renewed collateral attacks on final judgments whenever the American Psychiatric Association" updates its manual, and notes that nearly identical language governs successive motions by federal prisoners, so the ruling will affect federal cases too. According to SCOTUSblog, Louisiana and 21 other states also filed in support of Texas, calling the 5th Circuit's approach "a recipe for eternal Atkins claims and zero finality."

Johnson's argument. His lawyers, from the Federal Public Defender's office and Sidley Austin, argue in their brief that "available" ordinarily means capable of being used for a purpose, and that a rule under which a claim "had no possibility of merit" was not available to him. They say the diagnostic framework changed while his underlying characteristics remained the same. They reject floodgates concerns, saying few rules are retroactive and that only two prisoners had passed that threshold and neither had obtained habeas relief. The National Association of Criminal Defense Lawyers, per SCOTUSblog, compares the claim to second petitions based on discredited forensic science such as hair comparison and arson analysis.

How to read the arguments#

The Guerrero dispute turns largely on a word, and both readings have support in ordinary usage. Texas's carpenter analogy and Johnson's reply that a hammer locked in a toolbox is not "available" each capture something real about the term. The dispute is over statutory meaning and competing values, finality against accuracy in capital sentencing, not a case where one side's logic is plainly broken. The floodgates arguments on both sides are predictions: the states point to a 2021 change in the age-of-onset criterion as a possible next wave of claims, while Johnson's lawyers point to the small number of successful Cathey claims so far. Neither prediction can be tested before the Court rules.

In Maxwell, the open question may be less about habeas than about the review bar the government raised late. If the justices think Section 3621(b) forecloses Maxwell's claim anyway, they could decide the habeas question, send the case back, or dismiss it. Last term, after argument in Hamm v. Smith, a case about weighing multiple IQ scores in Atkins claims, the Court dismissed the case without deciding it, SCOTUSblog notes.

The cases concern rules for prisoners in both federal and state custody. Their significance rests on the statutory questions and the available remedies, rather than the timing of the midterm elections.

What we could not verify#

We relied on the parties' merits briefs, the Court's docket and argument calendar, and SCOTUSblog's previews. We did not open the Louisiana-led state amicus brief or the NACDL brief in Guerrero, and we describe them only as SCOTUSblog reported. We did not independently verify Maxwell's credit calculations or the competing expert evaluations of Johnson; those are disputed facts in the lower courts. The Court’s transcript archive provides the hearing record. This explainer distinguishes the briefs’ positions from a judgment. Our sourcing rules are on the methodology page.

Differing perspectives

How should federal habeas review apply to the custody claims in Maxwell and Guerrero?

Each position is summarized as its supporters make it, with equal weight and in alphabetical order. A summary is not an endorsement; the evidence for each is weighed in the story above.

• Allow review of a lower level of custody

  Who holds it: William Maxwell and his counsel

  Maxwell argues that habeas can challenge unlawful confinement at a more restrictive level, even when success would lead to a halfway house rather than complete freedom. He points to statutory language and historical remedies. He also argues that excluding habeas may leave prisoners without an effective way to enforce earned credits.

  In their words: Maxwell merits brief ↗

• Allow the vehicle but apply other statutory barriers

  Who holds it: United States in Maxwell

  The government agrees that a claim seeking an earlier transfer from prison can fall within habeas. It argues that this does not establish Maxwell’s entitlement to relief. Administrative exhaustion and the statutory restriction on review of placement decisions remain separate barriers, and it asks the Court to account for them.

  In their words: United States brief in Maxwell ↗

• Assess whether the constitutional protection could actually be used

  Who holds it: Dexter Johnson and his counsel

  Johnson argues that a constitutional rule is available only when a prisoner can meaningfully use it. He says later diagnostic standards made his intellectual-disability claim viable, even though Atkins already existed. His position seeks an opportunity to litigate that claim, not an automatic finding of disability or a new trial.

  In their words: Johnson merits brief ↗

• Keep custody-placement disputes outside this habeas remedy

  Who holds it: Court-appointed amicus Brian Barnes in Maxwell

  The appointed amicus argues that transfer to prerelease custody leaves the prisoner under Bureau of Prisons control and differs from release on parole or bail. He rejects a broad test based on levels of custody, arguing that it would turn many conditions or placement disputes into fact-intensive habeas cases.

  In their words: Court-appointed amicus merits brief ↗

• Treat later medical standards as facts rather than a new rule

  Who holds it: Texas in Guerrero

  Texas argues that Congress limited successive petitions to defined exceptions, and that Atkins was already available before Johnson’s first petition. A later medical manual does not create a new Supreme Court rule. The state emphasizes finality and the statute’s separate requirements for new law and newly discovered factual evidence.

  In their words: Texas merits brief ↗

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