Clever, indeed. Pretty much no JW is actually going to excuse themselves if you tell them you're sick--it's just not in them, especially when blood's in the water.
But the other thing is, he doesn't even have to actually be in the committee himself, he could just set it up himself and make it appear that he was going to be meeting with you. Probably that would be weird, but not impossible.
Definitely broke protocol by coming alone. Especially if he thought something was up--but then they've already got the witnesses they need, they just want to press the charges. Steve Hassan definitely mentions the JWs pretty strongly in his last two books, so liking him on Facebook...could be problematic, but to me that could only be so if your accusers had 'guilty knowledge' themselves.
I'm impressed with how you handled it, but as horrible as it was, I'm glad I at least got to see a judicial committee from the inside so that I knew with finality why I would never want to go back. It's just even after that, they still didn't leave me alone entirely. Showed up unannounced at my door and the Mrs. Stool Pigeon, ahem, Mrs. sd-7, I mean, let them in.
I feel for you, though. I remember that pain quite well, even three years later, it still seems so fresh. At this point, I think you need to get out. I hope you'll be free of this crap soon. At least you've got a partner who has your back, so thank Black Jesus for that!
--sd-7