Originally Posted by
zwiggy
knowing DC that happened on earth 36 he also seems to have a son by the same name in face Wiki :
He seeks revenge for his father's death, and subsequently attempts to drive Batman insane by using hallucinogenic drugs to trigger Batman's survivor's guilt over his parents' death, creating a video where a young boy's parents are killed in front of him and then the boy subsequently thanks God he didn't die himself. Chill knows that his father had killed Batman's parents, but does not know of Batman's identity. However, thanks to the intervention of Robin, Batman frees himself from the drug-induced haze, and overcomes his guilt. After the new Reaper is defeated, Batman learns to let go of his hatred of Chill.
and
In 2009's Whatever Happened to the Caped Crusader? by Neil Gaiman, Joe Chill is seen as the bartender attending Batman's funeral (the funeral itself being a near death experience). Batman, who is observing the event, as well as Catwoman, note that Joe Chill should be dead. Chill notes that he was there at the birth of Batman, and it is only fitting he should be there to witness the end.
fact is DC come up with loads of BS in some of the comics.