THE OPPENHEIMER RIDDLE

New evidence of Communist membership debated by scholars of Berkeley scientist

Recently uncovered documents show that Oppenheimer belonged to a hidden Communist Party cell of professionals in Berkeley, according to UC Merced history Professor Gregg Herken.

Hiss, White, Coplon, Rosenberg, Currie, now Oppenheimer. It is getting harder and harder to find an "innocent victim of anti-communist hysteria."

See also, this discussion over at Volokh.