"Interesting. So Dewey DID go after other commission members after all, not just Luciano. I have always been wondering why there were never mentions of any other Cosa Nostra bosses apart from Luciano being jailed by Dewey. What about Mangano, Profaci and Bonanno, did they ever go to jail when Dewey was prosecutor?"

No, I don´t think so. I don´t think Dewey knew what a big fish Gagliano actually was. The Commission was not known to LE at that time. I think Dewey settled to go against known gangsters in general and that his knowledge of Mafia was extremely limited, if he had any at all.