That Was All Me

A thief called the Shadow broke into the guest rooms of New York's luxury hotels to steal their jewelry and was never caught. Bitsy reveals that she was the Shadow and stole the jewelry to spite her neglectful parents. She never got caught because she used her parent's money to bribe the bellhops of the other hotels into helping her, and the cops never suspected her because she was a girl.

Example of:
Phantom Thief