This one depends on which side of the law you tend to find yourself on. If youre a villainous type, Johnny Tightlips is the best friend you could ever wish to have. He wont tell anybody anything and that extends to telling the doctor where hes been shot. He wont tell you how his mother is, or even if he has one at all. In short, he is the perfect man to join your legitimate businessmens social club. If law and orders more your thing though, Frankie the Squealers the guy for you. Want to know where your stolen bike is? Frankie will tell you. Want to know Fat Tonys embarrassing real first name? Frankie will tell you. You wont even need to bribe or threaten him; he just likes squealing because it makes him feel big.