TY JOUR TI JUDICIAL DISCRETION AND THE LIMITS OF ITS IMPLEMENTATION IN THE EVALUATION OF OPERATIONAL-SEARCH ACTIVITY RESULTS KW judicial discretion; operational-search activity; admissibility of evidence; law-enforcement discretion; legality; fairness; criminal proceedings JO Bulletin of the Kazan Law Institute of MIA Russia AU Odinazoda, I.A. PY 2026 IS 17 PB Kazan law institute Ministry of Internal Affairs Russian Federation