Appellants mother filed a petition for his indefinite commitment to a state mental hospital in accordance with Texas law governing involuntary commitments. Appellant had a long history of confinements for mental and emotional disorders. The state trial court instructed the jury to determine whether, based on "clear, unequivocal and convincing evidence," appellant was mentally ill and required hospitalization for his own welfare and protection or the protection of others. Appellant contended that the trial court should have employed the "beyond a reasonable doubt" standard of proof. The jury found that appellant was mentally ill and that he required hospitalization, and the trial court ordered his commitment for an indefinite period. The Texas Court of Appeals reversed, agreeing with appellant on the standard-of-proof issue. The Texas Supreme Court reversed the Court of Appeals decision and reinstated the trial courts judgment, concluding that a "preponderance of the evidence" standard of proof in a civil commitment proceeding satisfied due process a