The pseudonym Thomas B. Casasin belongs to a largely unknown Central Intelligence Agency (CIA) officer. His name appeared in a memo researchers for years have discussed that supports that at least one Agency employee considered using Lee Harvey Oswald for the acquisition of foreign intelligence. While this does not definitively connect Oswald to the CIA, it does offer that possibility was quite real. While the mythical secret agent Oswald a few offer is improbable, we do have verifiable evidence dispelling past claims that Oswald would never be considered for official use.i  However, there is more to the story of Casasin than just the prior versions of this notable memo...