Sgt. Bowe Bergdahl wrote a note expressing a desire to renounce his American citizenship, according to Fox News.

Fox News’ Jennifer Griffin reported Tuesday that members of Bergdahl’s unit said he left behind a note saying he felt disillusioned with the Army and wanted to renounce his citizenship before he was captured in 2009.

Griffin reported that the note has not been made public, nor been provided to Fox, but is part of the body of evidence being examined in the classified investigation.

There have been a number of questions surrounding the deal to release Bergdahl in exchange for five Guantanamo Bay detainees, including whether Bergdahl really got lost or was actively looking for the Taliban when he was captured.

Joint Chiefs Chairman Gen. Martin Dempsey said Tuesday the Army might still pursue an investigation that could lead to desertion charges against Bergdahl.

Reactions to Bergdahl’s release have been mixed, as people in his hometown and across the country consider the bizarre details of his capture and recovery.

Follow Zach Noble (@thezachnoble) on Twitter

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