Tip in at the buzzer

[dahoopref]

I saw this before my JC tournament game yesterday.

Team A (visiting) is down by 1 with 1.1 seconds left to play and must inbound the ball at the 28' mark opposite their bench. Everyone in the gym believes that Team A will set up an alley-oop play.

A1 inbounds the ball and passes it toward his team's rim for the alley-oop. The ball hits the back of the rim, bounces up, back down, rolls around the rim, and finally off the rim (what you have to picture is the players jumping up and down at the ball but no one touches it because their timing with the ball is off).

As the ball rolls off the rim the "horn" sounds to end the game but A2 (while both feet on the ground) quickly shoots the ball into the hoop (but thought the game was over because of the horn). The T & C know that the clock was started incorrectly.

Both teams think the game is over but the officials start to confer. Coach A & B realize what the officials are conferring about. Coach A starts complaining about that he is getting "homered" becauses he is the visiting team. Coach B says his players played the horn and did not defend A2's shot because they thought the game clock expired (and there was a defender right next to A2 when he shot).

1) What would you do?

2) What if either A or B touched the ball while it was on the rim? Basket interference?