Tough situation my partner put us in

[Smitty]

I'm in a camp scenario working with someone with only a couple years experience. The camp is using rec league middle school games, which is a whole other issue, but I digress. Situation:

White ahead by 15 and clearly will win by a lot more. I've already T'd a Blue team assistant coach. I am lead tableside, first half. Partner is trail opposite table. White is in possession, player is dribbling in my primary and loses control of the ball. Ball is heading toward sideline out of bounds. Dribbler catches up and flings the ball into her backcourt to avoid the ball going out of bounds. The only player back there is a blue player who is poised to retrieve the ball after it bounces and will have an easy layup. However...

As soon as the ball bounces in the backcourt, my partner blows his whistle and calls an over and back violation on White. There's not a White team player within 10 feet of the ball. When I go over and ask what he's doing, he has the deer in the headlights look. He realizes he's kicked it, but now what do we do? Do we give it to White since they were the team in control, even though they could not have touched the ball without violating? What would you do?