TY JOUR TI Expert as a scientific judge: we return to the discussion of a forgotten problem KW expert opinion KW collection of evidence KW special knowledge KW legal examination KW criminal procedure evidence KW expert JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Rossinskiy, S.B. PY 2020 IS 2020 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION