Help with NCAA men play please...

[vbzebra]

So I thought of this yesterday...what would you have?

NCAA Men rules...
A1 driving to basket, shot clock running down, drives past B1. B2 sets up in LGP outside of restricted arc. The following occurs in this order...

1). A1 releases ball on a shot attempt...
2.) then the shot clock horn goes off...
3.) then shot attempt hits nothing (airball) and it's obvious shot will not go in or hit anything...
4.) then we have A1 crash into B2 before the ball hits the floor...

Now my question is, do we have a shot clock violation (horn and airball before contact) or a foul on A1? Say B is in the bonus...shot clock violation or B2 shooting 1 & 1, since ball was completely out of A1's hands before contact?

Any rule/case reference would be greatly appreciated!