While not the focus of our investigation, we also developed evidence that the security culture of the State Department in general, and with respect to use of unclassified e-mail systems in particular, was generally lacking in the kind of care for classified information found elsewhere in the government
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We do assess that
hostile actors gained access to the private commercial e-mail accounts of people with whom Secretary Clinton was in regular contact from her personal account.
She also used her personal e-mail extensively while outside the United States, including sending and receiving work-related e-mails in the territory of sophisticated adversaries. Given that combination of factors, we assess it is possible that hostile actors gained access to Secretary Clinton’s personal e-mail account.
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and then the recommendation: ( precedent ?)
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In looking back at our investigations into mishandling or removal of classified information, we cannot find a case that would support bringing criminal charges on these facts
All the cases prosecuted involved some combination of: clearly intentional and willful mishandling of classified information; or vast quantities of materials exposed in such a way as to support an inference of intentional misconduct; or indications of disloyalty to the United States; or efforts to obstruct justice. We do not see those things here
( my comments)
so there needs to be "sheer quantity" / "Clear and intentional willful mishandling" or "vast quantities".
The "vast quantities" must be the gross negligence. what is "vast quantities?