From The New York Post:

One night, after finishing a guard-duty shift, Bowe Bergdahl asked his team leader whether there would be a problem if he left camp with his rifle and night-vision goggles — to which the team leader replied “yes.”

Bergdahl then returned to his bunker, picked up a knife, water, his diary and a camera, and left camp, according to Rolling Stone.

The next morning, he was reported missing, and later that day, a drone and four fighter jets ­began to search for him.

From ABC:

Nathan Bethea, a former soldier who says he served in Bergdahl’s unit, recently wrote that he and his colleagues had been forced to stay quiet about the truth of Bergdahl’s case.

“And that the truth is: Bergdahl was a deserter, and soldiers from his own unit died trying to track him down,” Bethea wrote in The Daily Beast Monday. “Bergdahl was relieved from guard duty, and instead of going to sleep, he fled the outpost on foot. He deserted. I’ve talked to members of Bergdahl’s platoon—including the last Americans to see him before his capture. I’ve reviewed the relevant documents. That’s what happened.”