There's a comedian who has a whole bit about former aliases. In college he was drunk and got arrested after a bar fight. And when he was being booked into jail they asked his name, and he was just being a drunk idiot and said, "They call me 'Tater Salad.'" Then 20 years later he was arrested again, and after looking him up in the system, the cop says, are you Ron "Tater Salad" White?
Yup...it's all in the system.