 McErlane was also suspected of shooting up "Buff" Costello's bar on February 10, 1926, wounding Sheldon gangsters William Wilson and John "Mitters" Foley.Newspaper headlines said, MACHINE GUN GANG SHOOTS 2.Both Chicago Police Captain John Stege and gangster Al Capone commented on the power of the submachine gun; both of their respective organizations set out to arm themselves with the formidable weapon.