 This was not just a coincidence as Shumway was tracked down at a dog track in Miami which also happened to be a big time interest of Capone.In late 1930, O'Hare alerted the Intelligence Unit that Capone had hired killers from New York to assassinate Wilson, prosecutor George E. Q. Johnson, and other law-enforcement officials in Chicago.After federal officials moved to foil the plot, they heard that Capone had sent the killers back in hopes of not incriminating himself.