In Detective Comics # 235 (1956), Batman learns that Chill was not a mere mugger, but actually a hitman who murdered the Waynes on orders from a mob boss named Lew Moxon. Batman also deduced that was why he himself was left unharmed by Chill: so he would unwittingly support Moxon 's alibi that he had nothing to do with a robbery that became a felony murder.
who ordered the hit on batman's parents
Lew Moxon