One fateful night, Joe Chill decided to rob rich people. After Bruce and his parents saw The Mark of Zorro, they were cornered in an alley by Chill threatening them with a gun and demanding that they hand their valuables over. A scuffle ensued and culminated with Chill shooting and killing the eight year old's parents. Witnessing the whole ordeal, Bruce took it upon himself to wage personal war on crime as the masked vigilante Batman.
Many years later, Chill appeared in during Batman's Black Mercy-induced dream. Bruce and his mother witnessed his father fighting back against Chill. When Wonder Woman managed to call out to Batman to remove the Black Mercy, the situation in his dream sequence changed for the worse to Bruce's horror. In the last moments of the fantasy, Chill finally managed to overpower Bruce's father and kill him.
The depicted subject bears the likeness of Joe Chill from the DC Comics; however, the DCAU character was never named on-screen, or otherwise. The title of this article is conjecture based on the character's likeness.