GPD evidence tampering

Overview: After acquiring more helpers from a classified ad in The Gotham Times, the Joker next aimed for Gotham Police headquarters, as he directed his followers to break into a police safe to steal evidence, namely the photo ID of Jake Karnassian, Manager of Buildings and Grounds for the Gotham Unified School District. (This may explain the Joker's prolific use of school buses for his terrorist activities.)

There was indication later on that mysterious violence had occured to Mr. Karnassian and his family.