Close, but no cigar. The Federal Penitentiary is off post, actually just outside Fort Leavenworth. The U.S. Army Disciplinary Barracks is on post. The USDB is where a soldier might spend time if so convicted and sentenced, as it is the only maximum security prison within the Department of Defense. I seriously doubt if the good LTC will ever see the inside of the USDB.
It must be something about U.S. Army AMEDD, perhaps they are still reeling from the Major Hasan fiasco.
Or maybe, a general court is precisely what LTC Lakin was looking for. A special court could be hidden within the bureaucracy, but it is tough to hide a general court.
Well, the White House would never interfere with Military Justice, but they might indicate they would not be displeased by a sentence more like Private Slovik's.