"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."
According to the official report on her death released the following year, she had earlier been "reprimanded" for showing "empathy" for the prisoners. One of the most moving parts of that report is: "She said that she did not know how to be two people; she ... could not be one person in the cage and another outside the wire."
Peterson 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.
A notebook she had been writing was found next to her body. Its contents were redacted in the official report.
The Army talked to some of Peterson's colleagues. Asked to summarize their comments, Elston told me: "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."
Elston said that the documents also refer to a suicide note found on her body, which suggested that she found it ironic that suicide prevention training had taught her how to commit suicide.