Character mistake: When on the phone to the police officer Sgt Halloran, noodles calls him Aiello. Danny Aiello is the real name of the actor.
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Suggested correction: In the scene you're referring to, the person Noodles calls, and the character Danny Aiello plays, was the police chief, not Sgt Halloran. In the film, Danny Aiello is credited as Police Chief Aiello. Also, his wife (played by Karen Shallo) is credited as Mrs. Aiello.