Valerii Pcholkin, Professor of the Department of Criminal Procedure, Criminalistics and Expertology of the Faculty №6 of Kharkiv National University of Internal Affairs, and Polina Myhalenko, a secrecy inspector of Cherkasy Region Drug Crime Department of the National Police of Ukraine, conducted a binary class on the topic "Principles of Operational and Investigative Activities."https://univd.edu.ua/uk/news/15610