What FBI agent (or the name of his group) was sent to catch Al Capone?

The FBI agent who played a crucial role in the effort to catch Al Capone was Eliot Ness. He led a special team known as the "Untouchables," which was tasked with enforcing Prohibition laws and bringing Capone to justice. Ness and his team focused on gathering evidence of Capone's illegal activities, ultimately leading to his conviction for tax evasion in 1931.