Batman #198

While investigating criminal activity at a transport company, Batman recognizes the owner, Joe Chill, as the man who killed Thomas and Martha Wayne years before. Batman tries to find evidence of Chill's illegal operations, but when he fails, he decides to reveal his identity to Chill and tells him that will be watching him and will catch him eventually. In a panic, Chill flees to his gang, but when they find out Chill is responsible for Batman's existence they shoot him, and only after do they realize that they should have asked Chill for Batman's real name.