AFAIK, although military criminal punishments are often quite serious (they’re not much for slaps on the wrists), executions are rare. In this case, though, I think someone could get it. From what I hear, this is a rape/murder involving a 14-year old in which there is eyewitness testimony. Although DNA hasn’t been mentioned, I’m gonna bet the soldiers’ hubris made them careless, and that DNA will be recovered from the victim. A confession might buy them life imprisionment instead of the death penalty, but with the evidence so far and the evidence that may be forthcoming, the prosecutor may decide he can win without a confession. In that case, he may refuse to make a deal.