TRIVIA---in THE UNTOUCHABLES, Eliot Ness (Kevin Costner) heads a team of Federal agents who are assigned to bring down notorious Chicago mobster Al Capone (Robert De Niro). After being unable to prosecute Capone for bootlegging, murder, extortion and other crimes, Federal accountant Oscar Wallace (Charles Martin Smith) suggests that Capone be charged with income tax evasion because he hasn't paid his income taxes in years. The Untouchables then nab Capone's bookkeeper and business ledger. At Capone's trial, the bookkeeper is the government's key witness and deciphers the ledgers showing Capone made millions of dollars from his criminal enterprises but paid no income tax.
Ness discovers Capone has bribed the jury and tricks the judge to switch juries with another trial resulting in Capone being convicted.
In reality, Capone was turned in by his own attorney, Edward "Easy Eddie" O'Hare, who became a government informant. He led IRS agent Frank Wilson to Capone's bookkeeper who deciphered the ledgers, and O'Hare told the Feds that Capone had bribed the jury which led to the judge switching the juries.
Shortly before Capone was released from prison, O'Hare was gunned down---most likely on Capone's orders.
O'Hare's son was Lieutenant Commander Edward "Butch" O'Hare who was the Navy's first ace and received the Medal of Honor in World War II. Chicago's O'Hare International Airport is named after the war hero.
THE UNTOUCHABLES starred Kevin Costner, Sean Connery, Robert De Niro, Charles Martin Smith and Andy Garcia.

Al Capone and Robert De Niro.

Butch O'Hare was the Navy's first ace and received the Medal of Honor.

A replica of O'Hare's F4F Wildcat is on display at O'Hare International Airport which is named after the war hero.
