inquisitorial

Adjective

• having the authority to conduct official investigations
  • the inquisitorial power of the Senate
    

• marked by inquisitive interest; especially suggestive of an ecclesiastical inquisitor
  • the press was inquisitorial to the point of antagonism
    
  • a practical police force with true inquisitorial talents- Waldo Frank
    

• especially indicating a form of prosecution in which proceedings are secret and the accused is questioned by a prosecutor who acts also as the judge