fact finder

or fact-find·er

  1. a person who searches impartially for the facts or actualities of a subject or situation, especially one appointed to conduct an official investigation, as in a labor-management conflict.

Origin of fact finder

First recorded in 1925–30
Related formsfact-find·ing, noun, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018