Count the basket?

[centkyref]

A5 goes up to dunk. Ball hits back of iron and goes straight up in the air. A5 hangs on rim doing a chin-up. Trail whacks A5 with a T for hanging on the rim, then ball goes through the basket. (Assume the T is valid & not a safety precaution; there was nobody around him) Count the basket or no?

After the game there was a lot of discussion about whether the basket should have counted or not. I don't remember how the crew on the game ruled it. I couldn't find any play in the case book that resembled it. I'm thinking that the basket should not count since the ball became dead when the technical was called which was before the ball entered the basket. I'd like to get your thoughts/reasoning on the ruling.