Penalty Administration????

[Camron Rust]

This really happened. It wan't in my game, it was relayed to me recently. I don't remember all of the specifics but here is the order of events....

1. A1 starts a try (in the act of shooting).
2. B4 grabs the rim and hangs onto it.
3. B4 lets go of the rim.
4. A1 is fouled in the act of shooting.
5. The shot is missed.

The official deems B4 had no valid safety reason for hanging on the rim and calls a technical foul for that act.

The point of this is not to debate whether the T was justified or the timing of the events....those are a given.

What are the penalties and how are they administered?