Who killed Robin's parents?
Approved answer
The Tragic Fate of the Graysons
As the youngest member of the renowned acrobatic family known as the Flying Graysons, young Grayson witnessed a devastating event when mafia boss Tony Zucco murdered his parents in a bid to extort money from their circus. In the aftermath of this tragedy, Bruce Wayne took Grayson into his care, guiding him to become his sidekick, Robin.