Bueno-Galdos' parents say he was the youngest of four children and joined the Army right out of high school. He was married but had no children.
Monday's killings are the deadliest of the Iraq war involving soldier-on-soldier violence.
Sgt. John M. Russell was taken into custody outside the mental health clinic at Camp Liberty following the shooting. He's charged with five counts of murder and one of aggravated assault.
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