English
Noun
whistle-blower
wikipedia|Whistle blower
#idiom One who reports a problem or violation to the authorities; especially, an employee or former employee who reports a violation by an employer.
#:We owe it to a small group of brave whistle-blowers that we know about the infractions at all.''
See also
blow the whistle
tattletale
de:whistle-blower
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