Sergeant Bowe Bergdahl may have not only been a deserter, but an active collaborator with the enemy, a senior Defense Department official told Fox News.

The unidentified source reportedly said that Bergdahl has been investigated by the U.S. intelligence community and is the subject of a “major classified file” which has yet to be seen by a relevant congressional committee.

The Pentagon official said, however, that if a request to see the file were to be made by a congressional committee, they’d likely gain access, according to Fox News.

This undated image provided by the U.S. Army shows Sgt. Bowe Bergdahl. The Taliban proposed a deal in which they would free the U.S. soldier held captive since 2009 in exchange for five of their most senior operatives at Guantanamo Bay, while Afghan President Hamid Karzai eased his opposition Thursday June 20, 2013 to joining planned peace talks. Credit: AP

This undated image provided by the U.S. Army shows Sgt. Bowe Bergdahl. The Taliban proposed a deal in which they would free the U.S. soldier held captive since 2009 in exchange for five of their most senior operatives at Guantanamo Bay, while Afghan President Hamid Karzai eased his opposition Thursday June 20, 2013 to joining planned peace talks. (Credit: AP)

Over the weekend, President Barack Obama announced that Bergdahl had been released, in exchange for five members of the Taliban that had been held at the Guantanamo Bay detention camp.

A separate administration official who focuses on counterterrorism told Fox News that “everybody’s looking” into Bergdahl’s disappearance and time spent over past five years.

“He’s not going to get a free pass,” the official reportedly said. “He’s going to have a lot of questions to answer — a lot. Is he a hero? No.”

A now-deleted tweet sent last week, before the exchange, from an account that appears to belong to Bergdahl’s father, stirred controversy over the weekend.

“I am still working to free all Guantanamo prisoners,” it said.

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