Dunk, then PC Crash - Basket Good?

[Freddy]

I'm searching for NFHS rulebook documentation on this play:
> A1 drives the endline, dunks, then, after the ball has passed through the net, crashes into B2 who had legal guarding position.
Search of past threads, as far as I could get through them, hinted that in Fed the score is not counted and A1 is charged with a PC foul, but that NCAA is different.
If this is correct (and please correct me if I'm wrong!), is this because the act of shooting includes the airborne shooter (4-1-2)? Otherwise it would seem to be a dead ball foul, the ball having passed through the basket prior to the foul.
Your help in helping my understanding would be helpful.
Thanx!