Final answer:
Al Capone was sent to prison for tax evasion. He ran an extensive criminal operation and was convicted of tax fraud. He served eleven years in prison, including time in Alcatraz.
Step-by-step explanation:
Al Capone was sent to prison for tax evasion. He ran an extensive bootlegging and criminal operation known as the Chicago Outfit or Chicago mafia, which included illegal activities such as bootlegging, prostitution, gambling, loan sharking, and murder. Despite his popularity due to his soup kitchens during the Great Depression, Capone was convicted of tax fraud and sentenced to eleven years in prison, including a stint in Alcatraz.