In the Lyons v. Oklahoma case of 1943, the U.S Supreme Court ruled in favor of defendant William Douglas Lyons, overturning his conviction for first-degree murder on grounds that his confession was coerced by police officers and therefore violated due process under the Fourteenth Amendment. The court found that Lyons had been subjected to a grueling interrogation lasting over seven hours without food or rest and threatened with mob violence if he did not confess. This extreme psychological pressure led him to falsely admit guilt for a crime he did not commit. The ruling emphasized that confessions obtained through coercion are inherently unreliable and violate fundamental principles of justice, setting an important precedent in American jurisprudence regarding police interrogations and defendants' rights.

In the dissenting opinion for Lyons v. Oklahoma, Justice Frank Murphy argued that the defendant's confession was coerced and should not have been admitted as evidence. He believed that Lyons' constitutional rights were violated when he was subjected to prolonged questioning under harsh conditions without access to legal counsel or family members. The majority ruling held that only physical torture would invalidate a confession, but Murphy contended this view ignored psychological coercion tactics which can be just as effective in extracting false confessions. Furthermore, he emphasized the importance of ensuring fair treatment for all individuals within the criminal justice system regardless of their guilt or innocence on specific charges. In his view, upholding such principles is essential for maintaining public confidence in law enforcement agencies and courts.