Justice Stevens agreed that Helms had a protected liberty interest and that Pennsylvania could not place him in administrative segregation arbitrarily. But he rejected the majority’s view that the interest existed only because Pennsylvania employed mandatory language and substantive predicates in written regulations. In his view, prisoners retain a constitutional residuum of liberty after conviction, and a transfer from the general population to conditions functionally equivalent to solitary confinement is a sufficiently grave, individualized change in status to trigger due process even without particular state-created rules.
The relevant inquiry, Justice Stevens argued, is whether the State has singled out a prisoner for treatment substantially harsher than the customary conditions experienced by the prison population. Helms was confined virtually around the clock, denied ordinary access to work, education, recreation, exercise, and rehabilitative programs, and placed under conditions materially indistinguishable from disciplinary segregation. That severe departure from the general-population baseline implicated liberty.
Justice Stevens accepted that officials could immediately segregate Helms during the emergency created by the riot and that an initial administrative-segregation decision did not require every safeguard required for disciplinary punishment under Wolff. But he maintained that due process required a meaningful opportunity for the inmate to appear personally and explain his position, not merely the chance to submit a written statement. Many prisoners may be poorly equipped to make an effective written presentation, and an in-person exchange would impose little burden.
He further argued that continuing segregation requires meaningful periodic review. A security risk or investigative need that may justify confinement at the outset cannot be presumed to persist indefinitely. Reviews should permit the inmate to make an oral statement, require officials to assess current conditions and the actual progress of the investigation, and produce a brief written explanation if segregation continues. Otherwise, an open-ended investigation can become a pretext for punitive confinement without sufficient evidence to sustain a disciplinary charge.
Justice Stevens concluded that summary judgment for the prison officials was improper. Material factual disputes remained over whether Helms appeared before the December 8 Hearing Committee, whether he had an adequate opportunity to present his views, why his segregation continued for more than seven weeks, and whether later review proceedings genuinely assessed the need for continued confinement.