Any classified pertaining to "Sgt" Bergdhal, to operations on the ground while he was in country, and even US strategy at the time, is obsolete or easily determined today. Anything Bergdhal himself knew is by definition obsolete.
The politicized officer corps is scrambling to make sure he's not convicted, and the deals aren't exposed, until this administration is out of the spotlight.
Once classified, data has to be declassified, else another law is broken.