Watch The Untouchables online: Episode 19 The Big Squeeze

Chicago. Prior to May 1934, robbing state banks was not a federal offense. Bandits only had local police to contend with, and they were often understaffed, inefficient or corrupt. This led to a rash of successful, though clumsily executed, bank robberies. In this city alone, there were 422 robberies in the last year, with 221 casualties. On March 1934, Eliot Ness is meeting with his friend D.A. Beecher Asbury. Ness tells him that until bank robbery becomes a federal offense, there's not much he can about it. Beecher is heading to Washington, D.C., to get the Senate Committee to make bank robbery fall under federal jurisdiction; to help his case, he wants Eliot Ness to go after a big-time professional bank robber: Ace Banner, who just pulled off a $150,000 heist in Kansas City. Finding Banner should be easy: he's right here in Chicago, staying at the swanky Crestmoor Arms. Although pinning something on him would be another matter. At this moment, a dapper Ace Banner walks into

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