About the Origins of the Problems of Differentiation and Unification of Preliminary Investigation

Differentiation of preliminary investigation is the main trend in the development of modern criminal proceedings. At the same time, the authors claim that it is the unification of the criminal procedural form that is the general rule, while differentiation is only an exception to it, which is especially noticeable within the framework of the technological approach to legal proceedings. In the article, against the background of the concept of unification of preliminary investigation, the advantages and disadvantages of the idea of its differentiation are analyzed.