Who killed Robin's parents?
Approved answer
Who Killed Robin's Parents?
The youngest member of a family of acrobats called the "Flying Graysons", Grayson witnesses the murder of his parents by a mob boss named Tony Zucco, who seeks to extort money from the circus that hired them. Following this tragedy, Bruce Wayne adopts Grayson as his legal ward and mentors him to become his sidekick, Robin.