 In November 1927 Aiello organized machine @-@ gun ambushes across from Lombardo 's home and a cigar store frequented by Capone , but those plans were foiled after an anonymous tip led police to raid several addresses and arrest Milwaukee gunman Angelo La Mantio and four other Aiello gunmen . After the police discovered receipts for the apartments in La Mantio 's pockets , he confessed that Aiello had hired him to kill Capone and Lombardo , leading the police to arrest Aiello himself and bring him to the South Clark Street police station . Upon learning of the arrest , Capone dispatched nearly two dozen gunmen to stand guard outside the station and await Aiello 's release . The men made no attempt to publicly conceal their purpose there , and reporters and photographers rushed to the scene to observe Aiello 's expected murder . Capone gunmen Frank Perry , Sam Marcus and Louis " Little New York " Campagna were arrested as they tried to enter the front of the station and placed in the cell next to Aiello , who Campagna told , " You 're dead , friend , dead . You won 't get up to the end of the street still walking " . Aiello pleaded for mercy and promised to sell his possessions and leave Chicago with his family if they let him go , but Campagna refused the request . When released , Aiello was given a police escort out of the station to safety . He later failed to make a court appearance after his attorney claimed he suffered a nervous breakdown . Aiello disappeared with some of family members to Trenton , NJ , where he continued his campaign against Capone and Lombardo . 
