Joseph Chill (Earth-4678)

"See that, kid? That's what happens when you try to be a hero."

- Joe Chill, to Bruce Wayne

Joseph "Joe" Chill was a petty criminal who murdered Bruce Wayne's parents Thomas and Martha Wayne as they where walking through Crime Alley behind the Monarch Theater with their son. Chill's murder of his parents drove Bruce Wayne to eventually become Gotham City's Caped Crusader, Batman.

Source

 * https://dc.fandom.com/wiki/Joseph_Chill_(Arkhamverse)