The United States v. Libellants and Claimants of the Schooner Amistad, tried before the U.S. Supreme Court in 1841, was made famous in the film Amistad in 1997. The National Archives site gives readers more information on the history of this case and the remarkable events that led to it:
“In February of 1839, Portuguese slave hunters abducted a large group of Africans from Sierra Leone and shipped them to Havana, Cuba, a center for the slave trade. This abduction violated all of the treaties then in existence. Fifty-three Africans were purchased by two Spanish planters and put aboard the Cuban schooner Amistad for shipment to a Caribbean plantation. On July 1, 1839, the Africans seized the ship, killed the captain and the cook, and ordered the planters to sail to Africa. On August 24, 1839, the Amistad was seized off Long Island, NY, by the U.S. brig Washington. The planters were freed and the Africans were imprisoned in New Haven, CT, on charges of murder.”...