Ben Mueller is a detective within the Gotham City Police Department.
Investigating The Ogre
With the death of Julie Kemble, Ben Mueller investigated her murder. His wife was soon after killed by Kemble's murderer, The Ogre, leading Mueller to drop the case, and scratch out a vital piece of information he had discovered and taken note of in his notes for the case. He was later questioned by Detectives Jim Gordon and Harvey Bullock as to what that piece of information was. Pleading with Bullock that the Ogre had killed his wife, and he still had a daughter, he revealed to them that he did background on Kemble and discovered that she was a nurse for a private cosmetic medical clinic.