Now the subjects of a massive manhunt and media campaign , Hamilton and Dillinger made a discreet visit to Hamilton 's sister 's home in Sault Ste. Marie , Michigan , on April 17 . After returning to Chicago , the gang retreated to the Little Bohemia resort near Rhinelander , Wisconsin . On April 22 , the place was raided by the FBI under the direction of Melvin Purvis , who had received a tip about the gang 's whereabouts from Henry Voss , a friend of Emil Wanatka , Little Bohemia 's owner . Unfortunately , the raid did not go as planned : the agents mistakenly opened fire on a car that contained three local work camp employees - Eugene Boisneau , John Hoffman and John Morris - after thinking they were gangsters . Boisneau was killed and Hoffman and Morris were both wounded
Little Bohemia
Little Bohemia Lodge
John Hamilton (gangster)