in·qui·si·to·ri·al /in-ˌkwi-zə-'tōr-ē-əl/ adj
1: constituting or relating to a system of justice in which the judge conducts an inquiry developing the facts of the litigant's case compare accusatorial, adversary
2: having the authority to conduct official investigations
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.