According to Guy Lawson's book "The Brotherhoods", yes. Never proven on some odd technicality, something to do with Eppolito's fingerprints on some sealed documents. Rosario Gambino's house was raided and they found police files with Eppolito's fingerprints on them. Eppolito also wrote about it in his book, I haven't read that one yet though. From what I remember he was suspended without pay while being investigated at the Department level, he went to some non-criminal hearing that was to determine if he could keep his job with the evidence they had against him, I think it ended up being dismissed or something.