muckrake
/ˈmʌkrɪk/; /ˈmʌkrɪk/Definitions
1. noun
a tool with long tines, used for raking up manure or other material from the ground, but also used figuratively for a person who investigates and exposes corruption, vice, or scandal.
“The journalist was known as a muckraker for her expose on government corruption.”