sentences:  The situation was made more complex by another alleged defector controlled by the FBI, codenamed Fedora, a KGB agent who posed as a Soviet diplomat to infiltrate the United Nations and provide false information to the Americans.Fedora was later revealed to be a KGB colonel named Victor Mechislavich Lesovski.Fedora confirmed Nosenko's story about Oswald and that he was indeed a KGB colonel and genuine mole.