In the case of Boyd v. United States, 1925, the U.S Supreme Court was tasked with deciding whether a warrantless seizure and subsequent use of evidence by federal officers violated the Fourth Amendment's protection against unreasonable searches and seizures. The defendant, Boyd, had been convicted for possession and transportation of liquor during Prohibition based on evidence seized from his home without a warrant. In its decision, however, the Supreme Court ruled in favor of Boyd stating that such actions indeed infringed upon his constitutional rights under both Fourth (protection against unlawful search) and Fifth Amendments (right to due process). This ruling established an important precedent in American jurisprudence known as "exclusionary rule", which prohibits courts from admitting illegally obtained evidence into trial.

The dissenting opinion in the Boyd v. United States case was not specified, as it is a lesser-known case from 1925 and detailed records are scarce. However, generally speaking, a dissenting opinion would challenge the majority's decision by arguing different interpretations of relevant laws or constitutional provisions. It could also highlight potential negative implications of the ruling for future cases or broader societal impacts. The justice delivering this hypothetical dissent might have disagreed with how evidence was obtained or used in court against Mr. Boyd, questioned whether his rights were adequately protected during trial proceedings, or raised other issues related to due process and fairness under U.S law.