Joe Chill

Joe Chill is the man responsible for Bruce Wayne turrning into Batman.
History:
Joe Chill was a criminal and a mugger in Gotham City.
He tried to mug Thomas and Martha Wayne, but ended up shooting and killing them in Crime Alley.
Years later, it was revealed he was working for a criminal known as Lew Moxon.
He was hired to kill Bruce Wayne parents, not knowing that later, Wayne would become Batman and strike fear into the hearts of his kind.