The article attempts to answer the questions of whether it is possible to use technical means to monitor the reaction of a person’s body for the purposes of criminal proceedings, and whether such an activity must be provided for in the Code of Criminal Procedure for its results to be considered admissible evidence in court. The study of this topic is aimed at learning about the problem of polygraph use and the use of polygraph opinion for evidentiary purposes. To better understand the possibilities offered by polygraph expertise, an attempt has been made to analyze the essence of the study and answer the question of how and to what extent it should be conducted, as well as the purpose of such studies. A thesis was presented in support of the use of the truth verification method for optimal case resolution without the need to isolate a separate provision that would allow the use of polygraph tests.