Document 259, an FBI internal memo dated 05/28/1964, explained that Oswald returned from Mexico to the United States in October 1963 (one month before the assassination), and Oswald used the alias "H.O. Lee," which apparently was not previously reflected in documentation about Oswald. | Document 259, an FBI internal memo dated 05/28/1964, explained that Oswald returned from Mexico to the United States in October 1963 (one month before the assassination), and Oswald used the alias "H.O. Lee," which apparently was not previously reflected in documentation about Oswald. |