 The Department of State's Office of Inspector General subsequently investigated the charges in response to a request by Representative Kathy Castor of Florida.In March 2011, it determined that it could find no evidence of a connection between the Black Swan case and the negotiations for the return of the artwork in question (a Pissarro painting).In September 2011, The 11th Circuit Court of Appeals agreed with the lower court's determination that the unidentified ship was in fact the "Nuestra Senora de las Mercedes" and ruled that Odyssey Marine Exploration must return the 17 tons of silver coins and other recovered treasures to the Spanish government.