Feynman did nothing wrong. The guy built a bomb to cover up his fraud. He probably intended to set it off regardless of what Feynman did, according to your link

Feynman did nothing wrong. The guy built a bomb to cover up his fraud. He probably intended to set it off regardless of what Feynman did, according to your link. Regardless, Feynman had no way of knowing there was a bomb there. It's completely appalling that he got away with it, despite killing a person and seriously injuring 2 more. He even successfully sued Feynman.