Dealer-Error Rulings

[WhiskyRiver]

I can't remember the exact situation, so the gist:
Board is Q-Q-A-2-4. TWo players left, one ends up all-in for about 60, the other player calls. I can't explain this one so don't ask, but the two flip over A3 and A5. One immediately says, "split pot" and the dealer starts to split it up, and the other player agrees through silence. The cards lay there for a second while it's split up, then flipped over and thrown in to the muck. Right as they're flipped over the player with the A5 says "wait, my kicker plays." Everyone agrees he was right. He asks the guy who runs the game for a ruling, and he says "it's a friendly game, you two do what you want."

I have seen something similar in a casino, and based on the "cards speak" theory, they went back to the cameras to verify the hands, and ended up splitting it but paying the actual winner the other half from their bank (I can't remember if it was the dealers or the house). Here we obviously don't have cameras, and no real "house" to compensate the guy.

Opinions on what should have been done?