Abstract: The research subject is the provisions of the rules of criminal procedure regulating the work of a head of interrogative unit and realization of the criminal procedure principles, and other materials and documents on this issue. The research object is social relations appearing during realization of criminal procedure principles during interrogation. The author analyzes different opinions about the role of criminal procedure principles; studies competitiveness, legality and reasonable time in respect to the work of a head of interrogative unit; proves their importance. The author uses various research methods: analysis, comparison, generalization and survey. The author concludes about the need to improve some provisions of the Criminal Procedure rules of the Russian Federation. To improve legality and effectiveness of the struggle against crime and legal safety of citizens, the author suggests pursuing comprehensive improvement of particular criminal procedural provisions and institutions and correction of legal deficiencies. 

Abstract: In this article Zyryanova examines the procedural, institutional and other powers of the inquiry unit head that may be used in the process of reduced inquiry. She also onsistently analyzes the role of inquiry unit heads  at each stage of inquiry and justifies the need to expand the scope of procedural powers of the inquiry unit heads at the legislative level. The author provides specific arguments in confirmation of the aforesaid. Given the above, the author of the article offers a revised version of Article 40.1 and Part 32. 1 of the Russian Federation Code of Criminal Procedure. In her research the author uses different research methods including specific research methosd and such methods as analysis, comparison, generalization and induction. The novelty of the research is caused by the fact that the author proposes to legally fix the responsibility of the investigator to reach a decision on the transition from one form pf inquiry to another from the Inquiry Unit Chief by making appropriate changes in Part 32.1 of the Russian Federation Code of Criminal Procedure. 

Abstract: The author of the present article analyzes powers and competences of a chief of inquiry division to eliminate procedural defects made by an inquirer at the pre-trial stage. The author analyzes different points of view regarding the terms 'powers' and 'functions' applicable to criminal procedure law. Zyrianova emphasizes the need to extend the scope of procedural powers of a chief of the inquiry division at the legislative level. The author provides particular evidences and proof of why it is necessary to do so. Based on the provisions made in her research, Zyrianova offers an amended version of Articles 225 and 40.1 of the Criminal Law Code of the Russian Federation. In her research the author uses different research methods, not only legal research methods but also analysis, comparison, generalization and induction. The novelty of the research is caused by the fact that the author offers to amend Part 4 of Article 225 of the Russian Federation Criminal Law Code. Besides granting certain powers to a head of the inquiry division, the author also offers to coordinate but not issue a criminal complaint or decision as well as to specify the exact timing of submitting a criminal case to a prosecutor. For this purpose, in the Criminal Law Code of the Russian Federation it is necessary to specify the exact period of time for submitting a criminal case to a prosecutor after fulfilling the requirements of Article 217 of the Criminal Code of the Russian Federation. In addition, Part 1 of Article 40.1 of the Criminal Law Code also needs to be completed in some parts and clauses.