In the United States v. Chavez et al., 1933, the Supreme Court dealt with a case involving an alleged violation of Prohibition laws. The defendants were accused of possessing and transporting alcohol in New Mexico, which was illegal under federal law at that time. They argued that their arrest and subsequent conviction were invalid because they had been arrested without a warrant by state police officers who then turned them over to federal authorities for prosecution. The Supreme Court ruled against the defendants, stating that even though state officers made the arrests without warrants, this did not invalidate their subsequent prosecution under federal law since there was no collusion between state and federal officials to evade constitutional requirements regarding search warrants or probable cause.

In the dissenting opinion for United States v. Chavez et al., Justice Cardozo disagreed with the majority's decision to uphold a conviction based on evidence obtained through wiretapping, arguing that it violated Fourth Amendment protections against unreasonable searches and seizures. He contended that private conversations should be protected from government intrusion unless there is a compelling reason to invade this privacy, such as preventing serious harm or crime. In his view, allowing law enforcement agencies to use wiretapped communications as evidence would set a dangerous precedent by eroding civil liberties and undermining public trust in the justice system. Furthermore, he argued that if Congress had intended for such methods of surveillance to be permissible under federal law when it enacted the Federal Communications Act of 1934, it would have explicitly stated so in its legislation.