examiner : Idioms & Phrases

• noun an examiner appointed to audit the accounts of banks in a given jurisdiction
  

WordNet

• noun someone who questions a witness carefully (especially about testimony given earlier)
  cross-questioner.
  

WordNet

Cross"-ex*am"in*er noun

Definitions

1. One who cross-examines or conducts a crosse-examination.

Webster 1913

• noun an official appointed by a government agency to conduct an investigation or administrative hearing so that the agency can exercise its statutory powers
  hearing officer.
  

WordNet

• noun a public official who investigates by inquest any death not due to natural causes
  coroner.
  

WordNet