As an adult, Joe Chill became a low-rent thug working for a crime boss named Lew Moxon. He was hired by Moxon to assassinate the Waynes, but was instructed to make it appear as a random mugging. Chill encountered Thomas and Martha Wayne, as well as their young son Bruce, in an alleyway as the family were walking home one night from a movie theater. He shot Thomas and Martha, but could not bring himself to kill young Bruce — instead turning and fleeing into the night. This brutal murder inspired Bruce to devote his life to fighting crime and he eventually became the caped crusader known as the Batman.
Chill was eventually killed by some gangsters who had a grudge against him.
- This version of Joe Chill, including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 44 Appearances of Joseph Chilton (Earth-One)
- 5 Images featuring Joseph Chilton (Earth-One)
- Quotations by or about Joseph Chilton (Earth-One)
- Character Gallery: Joseph Chilton (Earth-One)