three point 3 person question

[mutantducky]

so who signals this. Is it always the trail? I was at a game where the girl was more on the side of the trail person and he signaled three pointer but the center ref(no three point signal) had a view of it as did I in the stands on the trail side but free throw line extended. The girl was about a foot inside the line. Both feet were in. Awful job of guessing by the trail ref who was in no position at all to make the call. Luckily she missed. I say luckily because the game would have been tied. How would they have handled this? if she made it, do they blow the whistle right away to talk it over? You can't just let the play go on and time goes out and then you take away a point.