World's Finest Vol. 1 (1941-1986) #184

Plot

After the Automator kills the Batman, Robin devotes the next ten years of his life to hunting down the killer. When the thief dubbed Golden Gloves starts operating using technology strikingly similar to the Automator's, Superman and Robin investigate and discover that Golden Gloves isn't the Automator, but a brainwashed Batman, who was actually teleported away ten years ago by the Automator, whom they finally bring to justice.