Diaz v. Kopp

United States Court of Appeals for the Second Circuit · July 30, 2025 · No. 22-1678

Summary

This Second Circuit opinion determines whether a state prisoner’s challenge to unconstitutional conditions of confinement, seeking immediate release, is cognizable under a habeas corpus petition rather than a civil rights action under 42 U.S.C. § 1983. The court holds that such claims fall within the core of habeas corpus when the alleged constitutional violations can only be remedied by releasing the petitioner. Applying this standard, the court affirms the district court’s dismissal of the petition because the petitioner’s factual allegations regarding pandemic-related risks were conclusory and failed to state a plausible claim.

Court
United States Court of Appeals for the Second Circuit
Writing for the Court
Calabresi; Lohier; Nathan
Jurisdiction
United States Court of Appeals for the Second Circuit
Decision date
July 30, 2025
Docket number
22-1678
Procedural posture
Petitioner-Appellant appealed the dismissal of his 28 U.S.C. §2254 habeas petition by the United States District Court for the Southern District of New York.
Precedential value
published
Parties
Angel Diaz v. Marlyn Kopp
Disposition
affirmed

Topics

post-conviction reliefsection 1983civil rightsappellate proceduremootness

Practice areas

civil rightscriminal procedurehabeas corpus

Questions Presented

  1. Whether Diaz’s petition alleging unconstitutional conditions of confinement is cognizable as a habeas corpus claim under 28 U.S.C. §2254.
  2. Whether the transfer of Diaz from Sullivan to Sing Sing renders his petition moot.
  3. Whether the district court’s dismissal was proper given the speculative nature of Diaz’s factual allegations.

Holdings

  1. The court holds that a claim that challenges the fact of confinement and seeks release, even when based on unconstitutional conditions of confinement, is cognizable as a core habeas claim.
  2. The court holds that the transfer does not moot the petition because jurisdiction remains and Rule 23(a) does not create a mootness exception.
  3. The court affirms the district court’s dismissal because Diaz’s factual allegations are speculative and insufficient to state a plausible habeas claim.

Key quotations

We hold that Diaz makes a proper habeas claim here because he alleges violations of the Constitution that would require (rather than counsel) his (rather than any other prisoner’s) release from all available facilities. (at 1)
We accordingly hold that, at least where a petitioner alleges unconstitutional conditions that are irremediable but for the release of the petitioner, such conditions of confinement claims are cognizable under habeas. (at 7)

Factual background

Angel Diaz, incarcerated in New York State prisons since 1990, filed a pro se habeas petition in 2020 alleging that COVID‑19 conditions made his continued confinement unconstitutional and that he must be released. The district court held the petition non‑cognizable as a habeas claim and dismissed it.

Procedural history

The district court, relying on a magistrate judge’s recommendation, dismissed Diaz’s habeas petition on the ground that it was not cognizable and should be brought under §1983. The Second Circuit granted a certificate of appealability and reviewed the district court’s determination.

Court Document

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