>The nine-count indictment alleges that Wu Zhiyong (吴志勇), Wang Qian (王乾), Xu Ke(许可) and Liu Lei (刘磊) were members of the PLA’s 54th Research Institute, a component of the Chinese military.
How were they identified exactly? I'm always fascinated with these DOJ indictments of foreign state actors but I'm always left wondering how they managed to narrow it down to a small group of people. I'm guessing that "PLA’s 54th Research Institute" employs thousands of people so how does the FBI/DOJ identify the culprits so precisely? Is it through CIA/NSA spying and moles inside the PLA?
You don't see foreign governments identifying individual NSA employees when the NSA hacks into something... so how does the DOJ do it?