Joe Chill (Earth-50)

Joe Chill is a petty crook who murdered Thomas Wayne (Earth-50) and Martha Wayne (Earth-50), which drove their son, Bruce Wayne (Earth-50) to become the crimefighter known as the Batman.

Bio
Not much is known of Joe Chill's life, but he was the son of poor Irish immigrants who arrived in Gotham in the 1900's, and so he turned to crime, desperate as he was. It was sometime as a teenager that he turned to a life of crime, giving up hope, when he failed in school.