Who killed Robin's parents?
Approved answer
The Tragic Fate of the Graysons
The youngest member of the renowned acrobatic family, known as the Flying Graysons, witnessed the horrific murder of his parents at the hands of mafia boss Tony Zucco. Zucco killed them in a desperate attempt to extort money from the circus that hired them. Following this tragic loss, Bruce Wayne took Grayson under his wing as his legal guardian, training him to become his partner, Robin.