Dunking at Half 'T'.

Last week in a Boy's Varsity game we are at Halftime and B1 for some unknown reason tip dunks a ball. My partner was watching the whole thing and I heard the rim.

I just want to make sure we handled it correctly. We informed the coaches that we had a Technical against B1 and we would be shooting 2 free throws. My question then is do we give A the ball OOB even though B should have gotten the ball based on the arrow?