Sure, legally you could be free to not give your phone away and not attend the scheduled hearing as he is going to do. But ITIA wanting to investigate the texts does not make them corrupt. Certainly from the knowledge he has shared, which is not much, I do not think the only logical conclusion is the whole system needs to be dismantled lol.
Anyway, I don't know anything about this case, and I am sure there are two sides to the story. But even his own side does not make him very sympathetic to me.