in the operations asserted to CNN this week that at least six soldiers were killed in the search for Bergdahl.

The six soldiers at the center of the Bergdahl debate

How did 6 die after Bowe Bergdahl's disappearance?

Also making claims of troop deaths in the Bergdahl search is Sondra Andrews, the mother of 2nd Lt. Darryn Andrews, who was killed in September 2009.

She endorsed accusations by former unit members that Bergdahl deserted and caused U.S. troops to die in the search for him -- though Defense Secretary Chuck Hagel has said it's "unfair" to Bergdahl and his family to presume anything about his disappearance.

Andrews said she believes her son and other troops "were strictly on a mission looking for Bergdahl."

That information is "based on the men that served with Darryn,"she told Smerconish.

Andrews said that military should give her family information "on what Darryn was doing and why they lied to us."

"I'd like to see Bergdahl given an opportunity to tell his story, be on trial, have the witnesses come forward and tell their story and get the truth through that, and then I would like to see the full measure of the law followed for his punishment," Andrews said.

Watch: Obama defends Bergdahl swap

Bergdahl went missing on June 30, 2009, in Afghanistan's Paktika province, where he was deployed with the 1st Battalion, 501st Infantry Regiment, 4th Brigade Combat Team, 25th Infantry Division.

An Army fact-finding investigation conducted in the months after his disappearance concluded that Bergdahl left his outpost deliberately and of his own free will, according to the