That's known as "burying the lede," Canary.

We mentioned this one yesterday, but here goes: making an exhibition at a track meet in Star City, Black Canary saves a pole vaulter from a sabotaged pole, but the spotter who cut said pole is killed by an arrow to the back. An arrow with multicolored fletching, that emitted a bright flash of color when it hit. Canary asks Green Arrow who could've made a shot like that, and Ollie starts by denying it was him. Well, yeah, Ollie.

Ollie then runs down a couple of other archers who maybe could've done it, in terms of pure archery--Speedy, the late Blue Bowman--before the rainbow flash comes up again. Oh, yeah: maybe the Rainbow Archer, then.

Man, those Robin-booties are not helping. Looking him up, he was a former counterfeiter who turned to archery to try and get revenge on Green Arrow; and now he's color-coordinating his murder weapons. That seems like a bad idea from a legal standpoint...From World's Finest #244, "Rainbows of Doom" Written by Jack C. Harris, art by Mike Nasser and Terry Austin.