As far as WHO arranged it...

The four individuals—Richard Galatas, Herbert Farmer, “Doc” Louis Stacci, and Frank Mulloy—who, investigation disclosed, had engineered the conspiracy to free Nash, were indicted by a federal grand jury at Kansas City, Missouri on October 24, 1934. On January 4, 1935, the four were found guilty of conspiracy to cause the escape of a federal prisoner from the custody of the United States. On the following day, each was sentenced to serve two years in a federal penitentiary and pay a fine of $10,000, the maximum penalty allowed by law.

Might be interesting to dig up info on Galatas, Farmer, Stacci *(Melrose Park I believe) and Mulloy.