TY JOUR TI PROCEDURAL STATUS OF THE PARTY IN PRE-TRIAL COOPERATION AGREEMENT IN CRIMINAL PROCEEDINGS OF RUSSIA: CONTRADICTIONS OF THE SYSTEM AND VECTORS OF THE REFORM KW pre-trial cooperation agreement KW procedural status KW admissibility of evidence KW special procedure JO Volgograd Academy of the Ministry of the Interior of Russia AU Oleynik, E.A. PY 2026 IS 0 PB Volgograd Academy of the Ministry of Internal Affairs of Russia