I think this guy was fed the info...
PLAYBOY: Why would professional criminals confide their secrets to an outsider?ALINSKY: Why not? What harm could I do them? Even if I told what I'd learned, nobody would listen. They had Chicago tied up tight as a drum; they owned the city, from the cop on the beat right up to the mayor. Forget all that Eliot Ness shit; the only real opposition to the mob came from other gangsters, like Bugs Moran or Roger Touhy. The Federal Government could try to nail 'em on an occasional income tax rap, but inside Chicago they couldn't touch their power....
"Working in Chicago and other commnities between 1938 and 1946 Alinsky refined his methods...."