Who killed Robin's parents?
Approved answer
Origins of Grayson's Tragedy
As the youngest member of the renowned circus family known as the Flying Graysons, Grayson witnesses a tragic event in which the notorious mafia boss Tony Zucco murders his parents. This heinous act is committed in an attempt to extort money from the circus that hired them. Following this horrific incident, Bruce Wayne becomes Grayson's legal guardian and mentors him, preparing him to take on the role of his sidekick, Robin.