Sorry I didn't get back sooner, been busy with games. The clock had, in fact, expired. As I read the posts and think about the situation we probably should have put 1 second back on the clock because the foul occured before the clock expired.
Be that as it may, from what I gather, if, in fact, a technical had been called on the coach AFTER time expired the resulting FT would start the OT. If the technical was called while order was being restored and I put 1 second on the clock, allowing the other team to shoot a FT and possibly win the game I would have needed an escourt out of the gym.
That being said, I saw the offended coach the next day while doing more games and he told me, though I don't think I believe him, that they had a video of the game and the FT in question and that I was 1000% right on the call and he apologized for his behavior. I thanked him and accepted his apology.
So, thank you all for your responses. You always see something or experience something in this game that makes you stop and think.