The Story: "The Stellar Crimes of the Star-Tasr!" by Gerry Conway, Dick Dillin, and Frank McLaughlin. The story opens with Green Arrow, alone, relating this case into a tape recorder.
The story opens with Black Canary and Green Arrow transporting down to Star City, and they are discussing his increasingly uncomfortable presence in the JLA. He feels out of place and not doing the kind of work he really wants to do.
Suddenly they hear an explosion a few miles away, so Arrow fires a rocket arrow which carries them both to the scene of the melee.
Meanwhile, Arrow's presence in the team is also the subject of discussion at the JLA satellite. They all mention they've noticed a change in his demeanor, and it's Aquaman who seems to have the least sympathy for the Emerald Archer:
Anyway, this talk is interrupted by a distress signal, and the JLA heads own to Star City, just in time to see Arrow caring for a nearly-dead Black Canary, having been attacked by...the Star-Tsar!
At the hospital, Snapper Carr shows up, but Green Arrow nearly belts him before he can explain. Turns out Snapper's old costume was stolen from the Metropolis Police Department (way to go, MPD), so obviously someone else has assumed the role.
The JLA splits up, and both Superman and Green Arrow find the Star-Tsar simultaneously, at a concert at the Star City Stadium. But Arrow's stealth plan is ruined when the entire JLA busts in, in the middle of the Tsar's attempted kidnapping of the singer.
While the concert crowd nearly riots from panic, Arrow shoots some sort of smog arrow over him, blocking the light from the stars that gives him his powers.
Arrow then wraps up his report, finally realizing what all this had led to, his resignation from the Justice League of America:
Roll Call: Superman, Aquaman, Flash, Green Arrow, Atom, Black Canary, Elongated Man, Hawkgirl
Notable Moments: A big, momentus issue--the League's oldest "new" member leaves. As a kid, I was blown away by this turn of events.
Looking back on it now, you can see that the Green Arrow had become a bit of a jerk over these past dozen issues or so--something he ramps up to "11" next issue--so Gerry Conway was definitely stacking the deck.