Who killed Robin's parents?
Approved answer
The Tragic Fate of the Graysons
As the youngest member of the renowned acrobatic troupe known as the Flying Graysons, Grayson tragically witnesses the chilling murder of his parents at the hands of the mafia leader Tony Zucco. This heinous act was committed to extort funds from the circus that employed them. Following this devastating incident, Bruce Wayne adopts Grayson as his legal ward and trains him to become his sidekick, Robin.