U.S. Army Sergeant Bowe Berghdal U.S. Army Sergeant Bowe Berghdal

Serial, the NPR podcast that captivated listeners last year, may focus its second season on the case of an American soldier who vanished in Afghanistan in 2009 under "mysterious circumstances," according to Maxim.

Serial has announced that it will broadcast at least two more seasons, and sources tell Maxim that one of them will focus on Sgt. Bowe Bergdahl, who says he was abducted by members of the Taliban-linked Haqqani network in 2009 after he walked off of his post. He was released in May 2014 in exchange for detainees from Guantanamo Bay.

Bergdahl claims he intentionally walked away from his post in order to "cause a scene" that would create public awareness about unfavorable conditions in his unit. But other soldiers in his unit said he left the post dishonorably, and Bergdahl was later charged with desertion and misbehavior before the enemy. He faces life in prison.

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Serial host Sarah Koenig reportedly attended a preliminary hearing of Bergdahl's in Texas last week, and she and other Serial producers have also allegedly spoken with former members of Bergdahl's unit.

However, spokespeople for Serial refuse to confirm their involvement. "The Serial staff is currently working on several things simultaneously: Season 2, Season 3, and some other podcast projects," production manager Emily Condon told Maxim in a statement. "For now we're not talking publicly about anything that we're working on."

The second season of Serial is scheduled to premiere this fall, with the third bowing in 2016.