Most importantly what they learned was that Gus Alex, who had come into the organization as a bodyguard to Jake Guzak, was the outfit's controller over Congressman William L. Dawson. Alex and Dawson were so close, in fact, that Alex had a gambling pallor set up across the street from Dawson's home district office.
It was due to their control over Dawson that the outfit was able to control the Black Ghettos that they flooded with drugs, crap games, whorehouses and loan sharks.
Dawson was the absolute ruler over all the Black second ward and recognized spokesman for Chicago's black population. In Washington Dawson headed up the powerful House Committee on Expenditures and in Chicago he was known as Cook Counties Democratic machine patronage dispenser.
In the book by Frank's valet, George Jacob, in the chapter "Gangland," he tells of Frank's relationship with Mr Big, Sam Giancana.
One day Giancana related to Jacobs how he became the mob's boss of bosses.
Seems Sam was in a Terra Haute prison in the 40's with a Black guy who went on to became king of the numbers racket in Chicago....one of the few ways Blacks could get rich in those days.
The two connected and became partners, but as the world turned, Sam took over the games (nor saying how) but he was nice enough to setup the Black guy in Mexico for the rest of his life.