ive have been reading o. c. books for over 5o yrs, the first being "the green felt jungle" in 1959. and I have a question concerning what informant has done the most damage to organized crime? personally I would have to say joe valachi, he is the one who brought them out of the shadows, when kennedy brought him in front of congress to testify in 1963, the country had never been informed as to who the bosses really were. the Kefauver hearings were hurtful to the mob but, valachi hurt them more. anybody have any thoughts as to the informant who hurt them most?