TY JOUR TI To the question of differentiation of the preliminary investigation KW preliminary investigation KW preliminary investigation KW body of inquiry KW interrogator KW indictment KW guarantees of rights KW interrogator KW procedural competence KW criminal proceedings JO Legal Science and Practice: Journal of Nizhny Novgorod Academy of the Ministry of Internal Affairs of Russia AU Tangrieva, V.N. PY 2022 IS 2022 PB Nizhny Novgorod Academy of the Ministry of the Interior of Russia