In the case of Dunbar v. United States, 1894, the Supreme Court ruled on an issue related to maritime law and salvage rights. The dispute arose when a sunken ship was discovered off the coast of South Carolina by a group led by Alexander Dunbar. They salvaged valuable cargo from it but did not report their findings to customs officials as required by federal law at that time. When they attempted to sell these goods in New York, they were seized by U.S authorities who claimed ownership under maritime laws governing wrecks found within U.S territorial waters. Dunbar argued that he had rightful claim over the recovered items because international maritime law grants salvage rights to those who find and recover property from abandoned ships at sea; however, this argument was rejected both in lower courts and finally before the Supreme Court which upheld previous rulings stating that failure to report such finds forfeits any potential claims one might have over them according to domestic laws. The court's decision reinforced existing legal principles regarding salvage operations within national boundaries while also emphasizing adherence with procedural requirements set forth for reporting discoveries of lost or abandoned property at sea.

In the dissenting opinion for Dunbar v. United States, Justice Brewer argued that the majority's decision to uphold a conviction based on evidence obtained through an unlawful search was fundamentally flawed. He contended that such a ruling violated the Fourth Amendment rights of citizens against unreasonable searches and seizures. In his view, allowing illegally obtained evidence to be used in court would encourage law enforcement officials to disregard constitutional protections in their pursuit of convictions. Furthermore, he believed it was essential for courts not only to protect individual rights but also hold government authorities accountable when they overstep these boundaries. Therefore, he disagreed with the majority's assertion that excluding unlawfully seized evidence from trial proceedings would hinder effective law enforcement and maintained instead that upholding constitutional principles should take precedence over achieving prosecutorial success.