Justice Marshall argued that Lyons plainly had a live case or controversy because his damages claim against the City required him to prove that the officers acted pursuant to an unconstitutional municipal policy. Under Monell, the City could not be liable merely because its officers acted wrongfully; Lyons therefore had a direct and concrete stake in establishing the invalidity of the City’s chokehold policy.
In Marshall’s view, the majority improperly fragmented a single controversy by demanding separate standing for each requested remedy. Once Lyons established standing through his claim for damages arising from the City’s policy, the proper scope of declaratory or injunctive relief was a remedial question for the court to resolve, not a separate jurisdictional barrier.
Marshall maintained that the record supported the District Court’s finding that Lyons was choked without provocation under a Department-authorized practice. The City’s policy allegedly allowed life-threatening chokeholds in situations involving no threat of death or serious bodily injury, and the evidence showed repeated use of the holds and numerous resulting deaths.
He distinguished O'Shea and Rizzo because those cases did not involve a plaintiff with a viable damages claim whose resolution required adjudication of the challenged official policy. Here, Lyons’ past injury and damages action ensured a concrete adversarial presentation of the policy’s constitutionality.
Marshall also rejected the majority’s reliance on federalism and equitable restraint. The preliminary injunction was limited: it prohibited chokeholds absent a threat of death or serious bodily injury and did not impose the broad, continuing judicial management of a police department at issue in Rizzo. In his view, the Court’s rule effectively insulated systemic unconstitutional police policies from federal prospective relief whenever no victim could prove that he personally would be victimized again.