Al Capone Mabel Walker Willebrandt recognized that mob figures publicly led lavish lifestyles yet never filed tax returns, and thus could be convicted of tax evasion without requiring hard evidence to get testimony about their other crimes. She tested this approach by prosecuting a South Carolina bootlegger. In 1927, the Supreme Court ruled in "United States v. Sullivan" that illegally earned income was subject to income tax; Justice Oliver Wendell Holmes Jr. rejected the argument that the Fifth Amendment protected criminals from reporting illegal income. The IRS special investigation unit chose Frank J. Wilson to investigate Capone, with the focus on his
Genna crime family themselves bosses of the old Genna brothers territory of Little Italy. The Aiello brothers had an alliance with the Castellammarese Clan boss Salvatore Maranzano and close connection to the North Side Gang. The brothers attempted to murder Al Capone and become the most powerful organization in Chicago. Giuseppe Aiello was murdered in 1930 and Capone took over all Italian organized crime. Genna crime family The Genna crime family, was a Prohibition era crime family in Chicago. From 1921 to 1925, the family was headed by the six Genna brothers, known as the "Terrible Gennas". These brothers were Sicilians from the