whistleblower
/ˈwɪsəl ˌbloʊər/
noun
- A person who tells the public or someone in authority about dishonest or illegal activities within an organization.
- The whistleblower provided documents that proved the fraud.
- The company's whistleblower was awarded a percentage of the money recovered.
- Many whistleblowers face retaliation, but laws exist to protect them.