What Happened To Everyone Who Killed Batman?
4. Electrocutioner III
During 1992's Chuck Dixon-penned Electric City arc, Batman and Tim Drake's Robin are on the tail of deranged murder Elmo Galvan.
Sentenced to death via the electric chair, Galvan somehow survived his fate and became a walking electrical weapon with mean intentions. Not only did Elmo get the attention of Batman and Robin, though, but he also found himself in the crosshairs of a new Electrocutioner.
The third person to take up the Electrocutioner mantle, Lester Buchinsky - the brother of the original Electrocutioner - debuted here as a vigilante desperate to take down Galvan. And so determined in his mission, not even the Caped Crusader was going to get in Lester's way.
With Electrocutioner and Batman chasing Elmo through the sewers, Buchinsky's intensity saw him turn his own electric powers on the Dark Knight - to the point that he actually killed Batman.
That was the big cliffhanger ending of Detective Comics #644, yet the opening pages of the following issue saw the death of Bats quickly reversed. After a brutal beating by Robin, Electrocutioner agrees to shock Batman back to life.
As for what happened to Lester Buchinsky, he'd become an all-out villain working alongside Cluemaster, Blockbuster, Penguin and Prometheus - before 2010 saw Lester murdered by Roy Harper for his role in the death of Roy's daughter.