he gets taken down a peg I beleive was the exact quote...
and that could be simply the JLA has mindwiped him for many years...
starting with the Dr Light incident....
OR
Batman was the one who suggested the mindwipe....and none of the other JLA remembers (mindwiped themselves...save maybe Zatanna or shes mindwiped another way) but Dr Light reminds them!
So not finding the killer isnt the only manner it which a peg is taken out of the Caped Crusader....
