Reuben Efron (1911–1993) was a Lithuanian-American who served in the US Army and the Central Intelligence Agency (CIA).
He attended a Jewish high school, and following this Vytautas Magnus University where he studied law.
He spoke English, Russian, Lithuanian, Hebrew, Yiddish and German; serving in the US Air Force as a translator during World War 2.
[4] Efron was charged with the interception and reading of Lee Harvey Oswald's mail before the assassination of President John F. Kennedy.
He was also present when in February 1964 the Warren Commission, charged with investigating the assassination, interviewed Oswald's widow Marina.