Adams argued before the Supreme Court in the Amistad case, which involved the mutiny of Africans who had been kidnapped into slavery aboard the Spanish ship Amistad. The Africans argued that they were not slaves and should not be returned to Connecticut, where they had been placed by the U.S. commander who had found the ship. They also argued that they should not be returned to Spain since they were free Africans. Adams and Roger Sherman Baldwin argued the case on behalf of the Africans before the U.S. Supreme Court. The Court ruled in favor of Adams’s clients.