The FBI even mention him as an associate of Oppenheimer in the notes showing his 'do not bother' request.
The FBI even mention him as an associate of Oppenheimer in the notes showing his 'do not bother' request.
His association to Klaus Fuchs[2] was probably more suspect than Oppenheimer (despite how suspicious they were of him) given he was allegedly an actual spy (I say allegedly because I know how suspicious of the FBI people are around here, and not without reason in some cases).
According to the Feynman Bio I'm reading right now [3], Fuchs was said to have joked (when Feynman wasn't around) that he would be the most likely person to be a spy because of how often he left the base alone to visit his sick wife (or so he said).
[1] http://www.atomicheritage.org/history/soviet-atomic-program-... [2] https://en.wikipedia.org/wiki/Klaus_Fuchs [3] https://www.amazon.com/Genius-Life-Science-Richard-Feynman/d...
Fuch's was caught by MI5, not the FBI. And he gave a detailed confession even before he was arrested. So there isn't really any reason to be suspicious of his conviction.