441 U.S. 418 (1979), Supreme Court of the United States
Addington v. Texas is a foundational due process case that sets the evidentiary floor for involuntary civil commitment proceedings.
Does the Due Process Clause of the Fourteenth Amendment require proof beyond a reasonable doubt in involuntary civil commitment proceedings, or is a lower standard constitutionally sufficient?
The Due Process Clause requires the State to prove the need for involuntary civil commitment by clear and convincing evidence. A mere preponderance of the evidence is constitutionally inadequate given the significant deprivation of liberty, but due process does not require the criminal standard of beyond a reasonable doubt in this civil, predictive, and medical context.
Due process is satisfied by a clear and convincing evidence standard in civil commitment proceedings; beyond a reasonable doubt is not required. The judgment upholding Addington's commitment under a clear and convincing standard was affirmed.
Addington constitutionalizes the clear and convincing evidence standard for involuntary civil commitment, situating such proceedings among civil matters implicating especially important interests. It teaches that standards of proof are not interchangeable; they reflect normative choices about error costs and the nature of the factfinding task. For law students, the case is essential for understanding how due process calibrates procedural protections outside criminal law, the interaction between evidentiary burdens and substantive liberty interests, and the special challenges of adjudicating psychiatric evidence. Addington remains a cornerstone in mental health law and has influenced later civil commitment and preventive detention jurisprudence.