[Adam]

My two bits. Early on, once you realize he's a chirper, find a moment to get in front of his bench and talk to him. "Coach, I can't have you officiating this game." Or "Coach, I understand you're not going to agree with all of our calls, but I can't have you question every single one." Or "Coach, if you have a question, I'll answer if I have a chance, but we aren't going to have these constant comments."

If that doesn't work, two free throws almost always works.