Who killed Robin's parents?
Approved answer
The Murder of Robin's Parents
The youngest member of a family of acrobats renowned as the "Flying Graysons," Grayson is forced to witness the brutal act of a mafia boss, Tony Zucco, who murders his parents in a scheme to extort money from the circus that hired them. Following this tragedy, Bruce Wayne adopts Grayson as his legal ward and trains him to become his crime-fighting partner, Robin.