I think that tribunals could be concealed at the request of those indicted. Someone like McCain could argue that their reputation would be needlessly, permanently tarnished, the jury pool for future trials (of his) tainted by notoriety of going to trial, testifying.
It’s true of civilians who are charged and go through a murder trial and though acquitted, often suffer the second glances and innuendos if not outright accusations - the act of enduring a trial and “having to answer” for oneself can be seen as imparting a stigma, and in the case of politicians, one the “presumed innocent until proven guilty” may never overcome.
I believe these people are guilty, but the trials/tribunals commence with the understanding that it is not known and may therefore move to conceal it at the request of those on trial.
THere’s also the threat (promise) of civil unrest on the part of the deep state and people like Maxine Waters. I believe POTUS and his team will act wisely.
My knee-jerk reaction was to say “Who cares about no name’s stupid reputation?” but you make a good argument.