SHU Exclusion Law Requires Enumerated-Act Findings for Any Written Segregated-Confinement Sanction Imposed on RMHTU Residents—even if Served in an RMHU

Introduction

In Matter of Walker v Commissioner, N.Y. State Dept. of Corr. & Community Supervision (2025 NY Slip Op 02834; 241 AD3d 1 [3d Dept May 8, 2025]), the Appellate Division, Third Department addressed how New York’s Humane Alternatives to Long-Term Solitary Confinement Act (the “HALT Act”) and the “Special Housing Unit Exclusion Law” (Correction Law § 401) operate when an incarcerated person with serious mental illness resides in a residential mental health treatment setting.

The petitioner, Junarian Walker, was housed in a Residential Mental Health Unit (“RMHU”), which the statute treats as a type of Residential Mental Health Treatment Unit (“RMHTU”). After five Tier III disciplinary hearings arising from five misbehavior reports over a short period, he received written sanctions totaling 1,025 days of “segregated confinement.” DOCCS later administratively reduced the time, and Walker served the sanctions while remaining in the RMHU (with at least seven hours of out-of-cell time daily). Walker brought five CPLR article 78 proceedings seeking annulment/expungement of the unlawful portions of the dispositions because the sanctions could carry adverse future consequences on his institutional record.

The key issues were: (1) whether keeping Walker in an RMHU beyond three days without HALT Act findings violated Correction Law § 137 (6) (k) (ii), and (2) whether imposing written segregated-confinement sanctions on an RMHTU resident violated Correction Law § 401 absent the statute’s “exceptional circumstances” and enumerated-act findings—regardless of where the sanction was actually served.

Summary of the Opinion

  • HALT Act claim rejected: DOCCS did not violate Correction Law § 137 (6) (k) (ii) because Walker’s continued placement in an RMHU was neither “segregated confinement” (as statutorily defined) nor placement in an RRU, and RMHTUs are not RRUs under the statutory definitions.
  • SHU Exclusion Law claim sustained: The written sanctions violated Correction Law § 401 because DOCCS sanctioned an RMHTU resident “with segregated confinement” without a written finding that he committed one of the acts enumerated in Correction Law § 137 (6) (k) (ii), even though he stayed in the RMHU and did not actually experience segregated confinement conditions.
  • Relief: The court annulled the segregated-confinement sanctions and remitted for DOCCS to impose new, appropriate sanctions for the established violations, each not to exceed three days of segregated confinement.

Analysis

Precedents Cited

1) Mootness and “enduring consequences”

Walker had completed the imposed sanctions by the time of the appeal. The court relied on the “enduring consequences” doctrine to hold the challenge was not moot, emphasizing the continuing significance of disciplinary records.

  • Matter of Spence v Shah, 136 AD3d 1242 (3d Dept 2016), lv denied 27 NY3d 908 (2016): Cited for the proposition that completed discipline can remain justiciable because “enduring consequences potentially flow” from the sanction remaining on the institutional record. This case supplies the core doctrinal anchor for Walker’s ability to obtain relief despite completion.
  • Matter of Dawes v Fischer, 53 AD3d 902 (3d Dept 2008): Reinforces the same principle that collateral consequences can prevent mootness in prison discipline challenges.
  • Matter of Pleasant v Shope, 233 AD3d 1156 (3d Dept 2024): Distinguished as a case where mootness was found because the petitioner challenged only the severity of the penalty; Walker sought annulment/expungement of allegedly illegal sanctions, not a discretionary reweighing.
  • Matter of Smith v Annucci, 232 AD3d 1014 (3d Dept 2024): Contrasted as moot where the petitioner sought only a declaration the penalty was unlawful. Walker’s requested relief—annulment of the unlawful sanctions—was treated as materially different given the continuing record-based harms.

2) Statutory interpretation framework

The decision is driven by text-first interpretation principles—plain meaning, harmonization of related provisions, and de novo review on interpretive questions.

  • Quick v State Farm Mut. Auto. Ins. Co., 233 AD3d 1256 (3d Dept 2024): Cited for the baseline principle that courts effectuate legislative intent.
  • Hauser v Fort Hudson Nursing Ctr., Inc., 202 AD3d 45 (3d Dept 2021): Used for the rule that unambiguous statutory text controls (plain meaning) and that related provisions should be harmonized.
  • Matter of Schwabler v DiNapoli, 194 AD3d 1235 (3d Dept 2021): Supports both plain-language interpretation and the principle that statutory interpretation issues are reviewed de novo without agency deference.
  • Matter of Walsh v New York State Comptroller, 34 NY3d 520 (2019): Cited for the rule that when language is unambiguous, legislative history is unnecessary.
  • Matter of Anonymous v Molik, 32 NY3d 30 (2018): Reinforces the “unambiguous text” approach.
  • Matter of Covert v Niagara County, 172 AD3d 1686 (3d Dept 2019): Supports harmonizing related statutory provisions.

3) Negative implication (expressio unius) and omitted terms

To reject the argument that RMHTUs should be treated as RRUs for HALT Act purposes, the court relied on a negative-implication approach: when the Legislature defines categories separately and does not cross-include them, courts infer intentional exclusion.

  • Matter of Doe v City of Schenectady, 84 AD3d 1455 (3d Dept 2011): Cited for the inference that when the Legislature omits a term, exclusion is intentional.
  • People v Pinkoski, 300 AD2d 834 (3d Dept 2002), lv denied 99 NY2d 631 (2003): Reinforces the same canon against judicial insertion of omitted language.

4) Disjunctive phrasing (“or”) and statutory triggers

The court’s SHU Exclusion Law holding turns on the disjunctive: the statute prohibits sanctioning an RMHTU resident with segregated confinement or removing them and placing them in segregated confinement/RRU absent specified findings. Because it is “or,” each clause independently triggers the findings requirement.

  • Matter of DaimlerChrysler Corp. v Spitzer, 26 AD3d 88 (3d Dept 2005), affd 7 NY3d 653 (2006): Cited for reading “or” disjunctively—separate alternatives with separate effect.
  • People v Hardy, 128 AD3d 1453 (4th Dept 2015), lv denied 25 NY3d 1202 (2015): Further supports the disjunctive reading principle.

Legal Reasoning

A. Why the HALT Act finding requirement did not apply on these facts

Walker argued that DOCCS effectively placed him in restricted housing beyond statutory limits without making the written findings required by Correction Law § 137 (6) (k) (ii). The court rejected that framing by adhering to definitions:

  • “Segregated confinement” requires >17 hours/day cell confinement (Correction Law § 2 [23]). Walker received at least seven hours out-of-cell time in the RMHU, so he was not, as a statutory matter, subjected to “segregated confinement.”
  • RMHTUs are not RRUs. The court compared definitions in Correction Law § 2 (21) (RMHTU) and § 2 (34) (RRU) and found the Legislature “distinctly defined both terms separately,” with no textual basis to collapse them.
  • Correction Law § 401 (1) “comparable” language is not definitional. Although § 401 (1) requires RMHTU conditions/services to be at least comparable to RRUs and compliant with § 137 (6) (k), the court refused to treat that as a global statutory equivalence making RMHTUs into RRUs for all HALT Act applications.

In short: no “segregated confinement” as defined, no “RRU” placement, and thus no § 137 (6) (k) (ii) violation on the record presented.

B. Why the SHU Exclusion Law was violated even though Walker stayed in the RMHU

The court’s most consequential move is to separate (i) what DOCCS wrote as the disciplinary sanction from (ii) where and under what conditions Walker actually served the sanction.

Correction Law § 401 (5) (a) provides that an incarcerated individual in an RMHTU: shall not be sanctioned with segregated confinement for misconduct on the unit, or removed from the unit and placed in segregated confinement or a[n RRU], except in exceptional circumstances where the conduct poses a significant and unreasonable risk and the individual has been found to have committed an act defined in Correction Law § 137 (6) (k) (ii).

The Third Department held that because the statute is disjunctive, DOCCS must make the required “exceptional circumstances” and enumerated-act findings if either disjunct occurs:

  1. the person is sanctioned with segregated confinement for RMHTU misconduct, or
  2. the person is removed from the unit and placed in segregated confinement or an RRU.

Walker fit category (1): he was sanctioned, in writing, with segregated confinement. Yet it was uncontested that DOCCS did not make a written determination that he committed a § 137 (6) (k) (ii) enumerated act. That omission rendered the written sanction unlawful under § 401—regardless of the later administrative decision to have him serve the sanction in the RMHU.

The court also explained why this was not merely a technical error: the written sanctions, if left on Walker’s record, could generate prejudicial inferences and other collateral effects. This is the rationale for annulment even when actual conditions did not mirror segregated confinement.

C. Remedy calibrated to the statutory ceiling

Rather than ordering wholesale vacatur of misconduct findings, the court annulled only the unlawful sanctions and remitted for new sanctions “not to exceed three days in segregated confinement” for each proceeding. The remedy tracks the statutory baseline: beyond three days triggers heightened findings; absent those findings, DOCCS remains free to impose lawful alternatives.

Impact

  • Written dispositions must comply with § 401 even if DOCCS avoids SHU-like conditions in practice. Agencies cannot rely on later housing decisions (e.g., keeping someone in an RMHU) to “cure” a legally defective written sanction that purports to impose segregated confinement on an RMHTU resident.
  • Independent triggers under the disjunctive statute. DOCCS must treat “sanctioned with segregated confinement” as its own trigger for the exceptional circumstances + enumerated-act findings, separate from “removed and placed” scenarios. This closes a potential loophole where DOCCS could argue no “removal” occurred.
  • Record-based collateral consequences matter. The decision underscores that institutional records can create lasting harms, encouraging article 78 challenges aimed at expungement/annulment even after time is served—particularly where the issue is legality, not merely penalty severity.
  • Clarifies boundaries between HALT Act limits and mental health housing. By holding an RMHU is not “segregated confinement” when out-of-cell time exceeds the statutory threshold, the court provides a concrete, definition-driven metric that may shape how litigants frame “segregation” claims involving therapeutic units.
  • Operational compliance pressure. Respondent represented that DOCCS adopted a “prophylactic” policy to make required findings when an RMHU resident will serve an extended segregated-confinement sanction. Walker adds appellate backing that failure to do so risks annulment and remittal.

Complex Concepts Simplified

CPLR article 78 proceeding
A special lawsuit in New York used to challenge actions/decisions of government agencies (here, DOCCS), often used to review prison disciplinary determinations for legality and procedural compliance.
Tier III disciplinary hearing
The highest-level prison disciplinary hearing in New York’s system, used for the most serious alleged rule violations and capable of resulting in significant penalties.
Segregated confinement (Correction Law § 2 [23])
Statutorily defined as cell confinement for more than 17 hours per day. The definition matters because it determines when HALT Act restrictions and findings requirements are triggered.
RMHTU / RMHU (Correction Law § 2 [21])
Therapeutic housing for incarcerated individuals with serious mental illness, jointly operated by DOCCS and the Office of Mental Health. An RMHU is a type of RMHTU.
RRU (Correction Law § 2 [34])
A separate unit used for therapy/treatment/rehabilitation for people determined to require more than 15 days of segregated confinement. It is a distinct statutory category from RMHTUs.
“Disjunctive” statutory language
When a statute uses “or” to list alternatives, each alternative can independently trigger the rule. Here, “sanctioned with segregated confinement” and “removed and placed” are separate triggers.
Exceptional circumstances + enumerated-act findings
Under § 401 (and cross-referenced § 137 [6] [k] [ii]), DOCCS must make specific written findings: (1) the conduct poses a significant and unreasonable risk, and (2) the person committed one of the specifically listed serious acts. Without these findings, imposing segregated confinement on an RMHTU resident is unlawful.
Mootness and “enduring consequences”
A case can remain live even after a penalty is served if the challenged decision can still harm the person later—such as through negative inferences drawn from a disciplinary record.

Conclusion

Matter of Walker draws a sharp line between (1) the HALT Act’s placement limits keyed to the statutory definition of “segregated confinement” and (2) the SHU Exclusion Law’s categorical protection for RMHTU residents from being sanctioned with segregated confinement absent heightened, written findings. The decision’s central precedent is that DOCCS must comply with Correction Law § 401 at the level of the written disciplinary disposition: an unlawful written segregated-confinement sanction for RMHTU misconduct cannot be salvaged by subsequently having the person serve time in an RMHU. The remedy (annulment and remittal with a three-day cap absent findings) operationalizes the Legislature’s intent to tightly constrain solitary-like punishment for individuals receiving residential mental health treatment.