whistleblower
A whistleblower (whistle-blower or whistle blower)[1] is a person who exposes misconduct, alleged dishonest or illegal activity occurring in an organization. The alleged misconduct may be classified in many ways; for example, a violation of a law, rule, regulation and/or a direct threat to public interest, such as fraud, health and safety violations, and corruption. Whistleblowers may make their allegations internally (for example, to other people within the accused organization) or externally (to regulators, law enforcement agencies, to the media or to groups concerned with the issues).