Who killed Robin's parents?
Approved answer
The Tragic Fate of the Graysons
The youngest member of a talented acrobatic troupe known as the Flying Graysons, Grayson witnesses the mafia leader Tony Zucco brutally murder his parents in an attempt to extort money from the circus that employed them. Following this tragic event, Bruce Wayne takes Grayson under his wing as his legal ward and mentors him to become his crime-fighting partner, Robin.