The US government has an elaborate system of Inspectors General. The military uses them and the cabinet and agencies use them. From time to time they conduct audits in their area of responsibility, not the financial audit that comes to mind with that phrase but far more expansive examinations of whether or not a governmental agency is performing its mission well. These audits are usually very independent with exceptions where an Inspector attempts to ingratiate him or herself with the organization and most of them, after review by the agency, are publicly available. Those that reveal something of great public interest tend to be taken up by the media, at least for a few days.
Currently the IG report on Arlington Cemetary describing unmarked and mis-buried remains of soldiers has received media attention:
It is, as many IG reports are, a fascinating and in places damning document. It prompted immediate action by the Army including relief of the civilian in charge of the cemetery. I urge you to read it, at least through the summary but, if possible, through the recommendations.