As reported by Washington Post:
The State Department’s independent watchdog has issued a highly critical analysis of Hillary Clinton’s email practices while running the department, concluding that she failed to seek legal approval for her use of a private email server and that department staff would not have given its blessing because of the “security risks in doing so.”
The inspector general, in a long awaited review obtained Wednesday by The Washington Post in advance of its publication, found that Clinton’s use of private email for public business was “not an appropriate method” of preserving documents and that her practices failed to comply with department policies meant to ensure that federal record laws are followed….
...a top Clinton aide was warned in 2010 that the system may not properly preserve records but dismissed those worries, indicating that the system passed legal muster. But the inspector general said it could not show evidence of a review by legal counsel.
Depending on who warned the aide, the aides response could fall under the making false statements statute that put Martha Stewart in stir for 14 months:
18 U.S. Code § 1001 - Statements or entries generally
(a) Except as otherwise provided in this section, whoever, in any matter within the jurisdiction of the executive, legislative, or judicial branch of the Government of the United States, knowingly and willfully—
(1) falsifies, conceals, or covers up by any trick, scheme, or device a material fact;
(2) makes any materially false, fictitious, or fraudulent statement or representation; or
(3) makes or uses any false writing or document knowing the same to contain any materially false, fictitious, or fraudulent statement or entry;
shall be fined under this title, imprisoned not more than 5 years
The report includes interviews with Kerry and Powell and former secretaries Madeleine Albright and Condoleezza Rice, but it says that Clinton declined to be interviewed.