Batman #502 1993

Batman pursues the assassin Mekros, but is unable to capture him. He does, however, succeed in planting seeds of doubt in the mercenary's mind over whether the Gotham mobsters will really pay him. This leads him to be able to record a conversation which will enable the police to put two influential heads of Gotham crime families behind bars. Eventually, in the course of a standoff in a supermarket, he is able to capture Mekros, in the process saving him from assassination (by a representative of 'the Agency') himself.