In the case of Brown v. United States (1958), the Supreme Court ruled in favor of a defendant who had been convicted for refusing to answer questions before a congressional committee investigating labor racketeering. The court held that the Fifth Amendment's protection against self-incrimination applied not only in judicial proceedings but also when an individual was questioned by Congress. The decision overturned previous rulings which suggested that witnesses could be forced to answer incriminating questions as long as they were not under arrest or charged with a crime, and then later use their testimony as evidence against them in criminal proceedings. This ruling emphasized that individuals have broad rights under the Fifth Amendment and can refuse to provide potentially incriminating information even outside of traditional courtroom settings.

In the dissenting opinion for Brown v. United States, Justice Frankfurter argued that the majority had misinterpreted and misapplied the Federal Rules of Criminal Procedure in their decision to uphold a conviction based on evidence obtained through an unlawful search and seizure. He contended that Rule 41(e), which allows for suppression of illegally obtained evidence, should have been applied in this case because it was designed specifically to prevent such abuses by law enforcement. Furthermore, he disagreed with the majority's assertion that there was no constitutional violation involved since they believed Fourth Amendment rights were not violated due to lack of property interest by defendant in seized items. Instead, Frankfurter maintained that personal privacy is at heart of Fourth Amendment protections against unreasonable searches and seizures - regardless if one has property interest or not - thus making government intrusion into individual’s private life without proper justification unconstitutional.