In Watts v. Indiana (1948), the U.S. Supreme Court ruled on a case involving police interrogation and self-incrimination rights under the Fifth Amendment of the Constitution. The defendant, Robert Watts, was held in custody for seven days by Indiana law enforcement without formal charges or access to legal counsel during which he confessed to murder after prolonged questioning sessions. The court had to decide whether this confession could be used as evidence against him at trial given that it may have been coerced due to his lengthy detention and intense interrogations. The majority opinion, delivered by Justice Felix Frankfurter, found that such methods violated Watt's constitutional right against self-incrimination because they were inherently coercive and therefore rendered his confession involuntary. This decision marked an important development in criminal procedure jurisprudence as it emphasized not only physical coercion but also psychological pressure can render confessions involuntary thus unconstitutional.

In the dissenting opinion for Watts v. Indiana, Justice Reed argued that the majority's decision to overturn Watts' conviction based on a coerced confession was incorrect. He contended that there was no evidence of physical abuse or threats used during interrogation and therefore, it could not be concluded that his confessions were involuntary. The fact that he had been held in custody for an extended period before confessing did not necessarily mean coercion took place. Furthermore, he pointed out inconsistencies in the court’s application of due process clause regarding police interrogations across different cases which created confusion about what constituted as violation of this constitutional right. He believed such decisions should be left to state courts unless there is clear proof of federal rights being violated.