%0 Journal Article %T Study of the legal category "official" as a factor in improving the quality of law in the field of operational investigation. %A Kurtyak, A.I. %K research of legal category, official, functions, powers, legal responsibility %J Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia %D 2019 %N 2019 %P 5 %I SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION