The third female soldier to die in Iraq objected to interrogation techniques...

... and committed suicide, and nothing more was said except that her death was the result of “non-hostile weapons discharge," a catch-all term for what is usually accidental death or so-called "friendly fire."

From the article in Editor & Publisher, which describes a young woman who really was one of our finest:

Here’s what the Flagstaff public radio station, KNAU, where Elston now works, reported yesterday:

“Peterson objected to the interrogation techniques used on prisoners. She refused to participate after only two nights working in the unit known as the cage. Army spokespersons for her unit have refused to describe the interrogation techniques Alyssa objected to. They say all records of those techniques have now been destroyed. ...".

She was was then assigned to the base gate, where she monitored Iraqi guards, and sent to suicide prevention training. “But on the night of September 15th, 2003, Army investigators concluded she shot and killed herself with her service rifle,” the documents disclose.

The Army talked to some of Peterson's colleagues. Asked to summarize their comments, Elston told E&P: "The reactions to the suicide were that she was having a difficult time separating her personal feelings from her professional duties. That was the consistent point in the testimonies, that she objected to the interrogation techniques, without describing what those techniques were."