Happened to me last year

[Ref in PA]

Last year, I was the trail official working two man in a game that was near half-time when this play occurred in this order:

A1 was driving to the basket for a layup, guarded by B1. A1 starts the motion to shoot the ball.
B1 hacks A1.
Lead official blows whistle and indicates a foul.
A1 continues motion toward shot.
Horn blows - indicating the quarter is over.
A1 releases ball.
Ball goes through the hoop.

The whistle was clearly before the horn. The horn was clearly before the shot release. What is the correct call?


What we did is this:

Called foul on B1.
Did not count basket (because release was after the horn).
Cleared lane and put A1 on the line to shoot 2.