Batman Vol.1 #535
A disfigured man and his ape starts killing doctors across Gotham City by electrocuting them to death but dosing them with a strong sedative so they won't feel their deaths. Batman starts to investigate the crimes and he notices that the killer or killers leave a strange mark at the crime scene. Batman takes a picture of the symbol and makes his way to the batcave in order to create a link between the symbol and the first victim.
Estimated Condition: VF/NM (Used)