Little Leage: Challenging a Tag Up - is this a force out

Question
Hi,
I have Little leauge question in regards to tagging up. Here is the situation - player on 1st and 3rd with one out. Line drive is hit to the second baseman who catches the ball. The second basemen then throws the ball to 1st to try for the double play (the 1st base runner took 5 steps off the base). The ball is thrown over the head of the 1st baseman and out of play. The runner on 1st is on his way back to 1st when he sees the ball is caught, he then sees the over throw, turns around without tagging up at 1st and goes to second base. In the meantime the runner on 3rd tags up and runs home. The other team challenges the runner on 1st not tagging up and the coaches agree he is out for not tagging up. The controversy/question is does the run scored by the player tagging from 3rd count as he scored before the challenge was made?
Thanks,
Paul (coach of the base runners)

Answer
I'm sorry that this has taken me so long to answer, I was on vacation but forgot to say so on the site.

The run would not count, the time of the appeal doesn't matter either, only what kind of out it is. Since it is a force out it negates the run.

Again, I am sorry that I might sound short, I am very short on time.