 In at least three versions of the "Batman" mythos, the Waynes' killer is never identified.Batman's origin story is first established in a sequence of panels in "Detective Comics" #33 (November 1939) that is later reproduced in the comic book "Batman" #1 (Spring 1940), but the mugger is not given a name until "Batman" #47 (June–July 1948).In that issue, Batman discovers that Joe Chill, the small-time crime boss he is investigating, is none other than the man who killed his parents.