ive read here and there that he may have dry snitched on a few people.
http://www.onewal.com/maf-info.html
Charlie "Lucky" Luciano: Even Lucky cooperated. In an effort to avoid prosecution for drug trafficking, young Luciano cooperated in a narcotics investigation. There is also reason to believe that the future underworld czar passed information to federal agents during a beating that left him permanently scarred and that he helped set up his own underboss, Vito Genovese, for a drug bust. Frank Costello and Meyer Lansky are also believed to have cooperated in setting up Genovese.

i also read once he was assaulted by one of his associates in prison whilst doing time for his prostitution ring.