(CNN) -- The U.S. Army has appointed a two-star general to investigate how and why Army Sgt. Bowe Bergdahl left his base in Afghanistan, resulting in his capture, a senior defense official said Saturday.
Bergdahl spent five years in captivity until his release May 31, in exchange for five Taliban figures being held at a U.S. military detention facility in Guantanamo Bay, Cuba.
Bergdahl returned to the United States -- specifically to an Army medical facility in San Antonio, Texas -- early Friday.
The investigating officer looking into the circumstances surrounding how Bergdahl went missing is expected to begin working on the case next week, though that doesn't necessarily signal anything about when the sergeant will undergo formal questioning.
The senior defense official declined to name the general who will investigate until there is a formal announcement.