Claim: Leo formed the Lanzetta Gang by himself in the late 1920s and controlled bootlegging in Little Italy.
Evidence: The Lanzetta Brothers, also known as the Lanzetti Brothers (due to incorrect documentation), was a group of six brothers who ran bootlegging operations in Philadelphia and possibly Atlantic City. 
There were six brothers in the gang: Leo, Pius, Ignatius, Lucien, Willie, and Teo.