Whether substantive due process permits Kansas to civilly commit a sexually dangerous person based on a “mental abnormality” or personality disorder rather than a finding labeled “mental illness.”
Holding
Yes. The Act satisfies substantive due process because it requires both dangerousness and a mental condition that causes serious difficulty controlling dangerous behavior; the Constitution does not require a State to use the particular term “mental illness.”
Reasoning
Freedom from physical restraint is a fundamental liberty interest, but it is not absolute. States may civilly confine a narrow class of people who are dangerous and unable to control their behavior, provided they use constitutionally sufficient procedures and evidentiary standards. The Act requires more than a general prediction of dangerousness: it requires past sexually violent conduct and a present condition making future predatory sexual violence likely.
Dangerousness alone ordinarily cannot justify indefinite civil commitment. But the Act links dangerousness to a “mental abnormality” or personality disorder, defined as a condition affecting emotional or volitional capacity and predisposing the person to sexual violence. That additional requirement narrows commitment to persons whose dangerousness is not adequately within their control.
The Constitution gives no talismanic force to the phrase “mental illness.” Psychiatric and legal definitions of mental illness vary, and the Court has never required States to adopt a particular medical label in civil-commitment statutes. Legislatures may define medical conditions for legal purposes, particularly where professional views are contested.
Hendricks' own circumstances satisfied the constitutional standard. Professionals diagnosed him with pedophilia, which the psychiatric profession recognizes as a serious disorder, and he admitted that he could not control his urges to molest children when stressed. His impaired volitional control, combined with his history and likelihood of future sexual violence, distinguished him from dangerous persons who may be dealt with only through criminal law.