Robert Andrews believes his own son might still be alive if U.S. Army Sgt. Bowe Bergdahl had not gone missing from his Afghan guard post on June 30, 2009.

As Bergdahl emerges from five years of Taliban captivity, former comrades are accusing him of walking away from his unit and prompting a massive manhunt they say cost the lives of at least six fellow soldiers, including Andrews' son, Darryn, 34, a second lieutenant.

"Basically, my son died unnecessarily, hunting for a guy that we shouldn't even have been hunting for," Andrews said.