The Untouchables were special agents, also known as "dry agents," of the U.S. Bureau of Prohibition led by Eliot Ness, who, from 1930 to 1932, worked to end Al Capone's illegal activities by aggressively enforcing Prohibition laws against his organization. Legendary for being fearless and incorruptible, they earned the nickname "The Untouchables" after several agents refused large bribes from members of the Chicago Outfit.[1]: 311–331, 349–365, 390–394, 398–399, 492–496
Due to its significant success and enduring legacy, the unit has subsequently had a lasting impact on the techniques and methods of modern organized crime law enforcement units.[2]