Definition of "Inquisitorial" :

adjective: having the authority to conduct official investigations

"The inquisitorial power of the Senate."

adjective: marked by inquisitive interest; especially suggestive of an ecclesiastical inquisitor

"The press was inquisitorial to the point of antagonism."

adjective: 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