John D'Arco Sr. (March 27, 1912 – October 27, 1994) was an American politician, who was involved in organized political corruption, illegal gambling and prostitution activities in Chicago, Illinois, US.
[1] D'Arco was born in Chicago, Illinois, on March 27, 1912 to parents of Italian ancestry.
Growing up in the Near West Side, he allegedly developed connections with street gangs in Chicago's Little Italy, during the 1920s.
He was known for providing protection to the Chicago criminal gangs, including the Chicago Outfit, and participating in a variety of criminal activities, ranging from organized corruption of city officials to prostitution.
[1][2] During the 1970s, D'Arco was investigated by the US federal government for his alleged involvement in an attempt to fix the 1977 murder trial of reputed hitman Harry Aleman, but he was never indicted.