In the case of Rudolph et ux. v. United States in 1961, the Supreme Court ruled on a matter concerning tax evasion and fraud. The appellants, Mr. and Mrs. Rudolph, were convicted for evading federal income taxes by underreporting their income from a gambling operation they ran between 1946 to 1950 inclusive; they also faced charges for conspiracy to defraud the U.S government through this act of tax evasion during those years as well as in 1951 and part of 1952. The couple appealed against these convictions arguing that evidence used against them was obtained illegally because it was seized without a warrant during an unlawful search conducted by state police officers who later handed over this evidence to federal authorities. However, the Supreme Court upheld their conviction stating that even if there had been an illegal search or seizure at state level (which wasn't conclusively proven), it would not affect proceedings at federal level since different jurisdictions were involved - thus rejecting what is known as "the silver platter doctrine". This doctrine previously allowed federally admissible evidence which had been collected unlawfully by state officials but passed onto Federal law enforcement agencies.

In the dissenting opinion for Rudolph et ux. v. United States, Justice Hugo Black argued that the majority's decision to uphold a conviction based on evidence obtained through warrantless wiretapping was in direct violation of the Fourth Amendment's protection against unreasonable searches and seizures. He contended that allowing such practices would set a dangerous precedent, effectively granting law enforcement agencies unchecked power to invade citizens' privacy without due process or probable cause. Furthermore, he expressed concern over potential abuses of this power by government officials seeking to suppress political dissidence or other forms of lawful dissent under the guise of criminal investigation. In his view, upholding constitutional rights should take precedence over prosecutorial convenience in order to maintain public trust in legal institutions and safeguard individual liberties from unwarranted governmental intrusion.