Warning: The following contains SPOILERS for Gotham Knights season 1, episode 6, "A Chill in Gotham."In a major change from the established DC Comics lore, Joe Chill is innocent of killing Batman's parents in Gotham Knights. Set in an alternate reality apart from the core Batman universe, Gotham Knights has already made several big changes, starting with the death of Batman himself. However, the changes to the story of mugger Joe Chill put forth in Gotham Knights season 1, episode 6, "A Chill in Gotham," significantly change the status quo even more.
https://screenrant.com/joe-chill-innocent-dc-batman-parents-deaths-change/