Having a Batman: Arkham Knight Riddler ... Device on it to reveal her Batgirl suit. Scan this to solve the riddle. Solved within the GCPD Lockup. Scan the Arkham mug at the main desk by Cash.

With a flurry of Arkham Asylum inmates assisting her after their therapy sessions, Dr. Q arrives at ACN in a suit similar to the one that the Joker wears in Batman, albeit with inverted colors ...