Besides Newark or NJ, heres some additional info regarding Alex's dealings in New York in general. It seems the feds needed at least 3 or 4 years (from 1962 until 1966) just to find out about his business over there, which was allegedly union racketeering, besides often using the city as departure point to Europe. For a nationally known gangster at the time, the guy was obviously still very elusive.
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Mongol General: Conan, what is best in life?
Conan: To crush your enemies, see them driven before you, and to hear the lamentations of their women.