whistle-blower

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But his record on whistle-blower protection, another key area of concern, has been less laudable.
在另一关键领域，即在对检举者的保护方面，奥巴马的记录却并不那么值得称赞。
Now a spy, traitor or whistle-blower can put gigabytes of data on a fingernail-sized card and pass them on anonymously, irretrievably and all but instantly.
如今的间谍、叛徒或者告密者能把数以G计的资料放进指甲盖大小的卡片里并且四处传播，不为人知，难以追回，而且差不多能瞬间完成。
Koch spokeswoman Cohlmia says the company reported its compliance issues to the state before a whistle-blower did so.
科赫公司发言柯西米亚称公司已在检举人举报之前向州监管者报告了其合规问题。

But a single whistle-blower with a conscience can also turn your entire organization inside out.
FORBES: The Forbes Post
As with many whistle-blower complaints, the person filing this matter asked not to be identified.
FORBES: SunTrust Or Untrustworthy For SEC Chair Mary Jo White
That requires company cooperation--unlikely to be forthcoming when a company is in trouble--or a whistle-blower.
FORBES: Magazine Article

a person who tells someone in authority about something illegal that is happening, especially in a government department or a company

A whistle-blower is someone who finds out that the organization they work for is doing something immoral or illegal and tells the authorities or the public about it.