Giacomo "Jack" William Tocco (c. 1927 – July 14, 2014) was an Italian-American mobster and long-time leader and mob boss of the organized crime organization known as the Detroit Partnership, based in Detroit, Michigan. Of Sicilian ancestry, he had numerous legitimate business holdings.Jack Tocco was also convicted of "Horse Doping" at Hazel Park Raceway in 1970, as it was widely reported in The Detroit News and The Detroit Free Press.