[EricH]

Couple of things:

First, I'd like to point you over towards FAHA, where all questions are anonymous by default. It's slower than the general forum, however, so I understand some urgency.

Second, the first thing I would have suggested is going to the administration. You've done that, so the only thing I can suggest is that the entire team (not just one segment), including the teacher if possible, take a couple days off. No work on the robot, no work on anything robotics related, aside from what I'm about to suggest. The team (including the teacher) should take the time to think about why they're doing FIRST Robotics Competition. What are the team's goals? What is the team's mentor agreement? (And is this teacher bound by that mentor agreement?)

Other than that time off and thinking, let the administration work. If need be, make sure they understand the need for an expedient solution to this problem--if they don't have a resolution in a matter of days, there's a distinct chance that the entire team disappears before competition, which does not reflect well upon the school.