Siclian Notes says so.
I think not.
Moussaui an enemy combatant. He waged war on the United States and plotted terror attacks on civilians. He waged war out of uniform, and beyond the rules-of-war with deliberate terrorism of non-combatants.
I would not have tried him in a civilian court though. He should have been sent to Gitmo along with the 20th hijacker, Muhammed al-Qahtani, and sat it out for the duration of this conflict. We can try him later as a war-criminal.
But I think it was wrong to try him in a civilian court.