muckraker

Definitions

• (US) One who investigates and exposes issues of corruption that often violate widely held values; e.g. one who exposes political corruption or the poor conditions in prisons.
• (British) A sensationalist, scandalmongering journalist, one who is not driven by any social principles.
• (US) One of a group of American investigative reporters, novelists and critics of the Progressive Era (the 1890s to the 1920s)