Ok spill. How do you know it’s not true? So that I know.
Any of the prosecutors assigned will be able to prosecute any of the crimes in the cases they are assigned. To be believable, Sidney would be the only 'Treason' lawyer in the US. Treason is a Federal crime, any Federal Prosecutor (Military Prosecutors are Fed prosecutors) can run that case if they get it. Hell if I was a lawyer I could prosecute it with they evidence they will have @ hand.
In a military tribunal the 'evidence rules' are way broader than other proceedings. The accused and counsel are shown all the germane evidence against the accused prior to going to 'court'. In these cases there will be tons of evidence where the accused will stand opposing their own words, email, letters, phone calls etc. I imagine there will 'options' prior to the court proceeding where the accused may get a better deal than what awaits them in court. The pace of court will be fast, automatic 30 day review of sentence, then sentence will be carried out. If you are 'guilty' and you wouldn't be there is they don't 'have it all' it will behoove you to deal as best you can, because after the trial it is death or max.