In the case of Ford et al. v. United States in 1926, the Supreme Court ruled on a matter concerning prohibition laws and their enforcement. The defendants were charged with conspiracy to violate the National Prohibition Act by possessing and selling alcohol illegally. They argued that evidence used against them was obtained through an unlawful search and seizure, violating their Fourth Amendment rights. However, the court found that there had been no violation as federal officers had acted upon reliable information from a credible informant who witnessed illegal activities at defendant's premises which justified obtaining a search warrant without further delay or additional investigation into allegations made by informants before proceeding with searches or seizures under such circumstances.

In the dissenting opinion for Ford et al. v. United States, Justice McReynolds disagreed with the majority's decision to uphold a conviction based on evidence obtained through wiretapping. He argued that this violated the Fourth Amendment rights of citizens against unreasonable searches and seizures. The justice believed that private telephone conversations should be considered as part of an individual's personal effects, thus protected under constitutional law from unwarranted intrusion by government authorities without proper legal justification or warrant. Furthermore, he contended that allowing such practices would set a dangerous precedent where privacy could easily be invaded in pursuit of criminal prosecution, undermining civil liberties in favor of state power.