The article is dedicated to the jubilee of a famous Russian criminologist Mikhail Petrovich Kleymenov. The versatility of research talents of this professor is connected with his initial interest in the multitude of crime counteraction problems. He authored over 340 research publications, including 11 monographs, 9 manuals in criminal law and criminology in which he studied complex problems of crime, as well as textbooks, including one that he wrote without co-authors. The sphere of Professor Kleymenov’s research interests is very wide, which reflects not only the multifaceted character of his “criminological talent”, but also his true interest in studying the multi-aspect problem of crime and crime counteraction, it is a logical consequence of the development of his research career. A constant desire to widen his knowledge is reflected in the dynamic research of actualizing and transforming spheres of criminal behavior. His loyalty to the development of theoretical and practical aspects of such areas as organized crime and crimes of corruption, unsolved crimes, criminal law and criminological prediction, interconnection between moral, cultural level, spirituality and criminal behavior, extremism and problems of criminological measurement makes it possible to deepen the available knowledge and considerably enrich research in this sphere. Being the founder of special theories of criminology (sport criminology, ethno-criminology, medical criminology), the professor has numerous disciples and his own school of research. The analysis and review of all research achievements of professor M.P. Kleymenov requires a separate publication. His research and development of complex criminological problems, long-term and diversified work of studying different aspects of crime counteraction, and genuine interest in criminological theory have contributed and are still making a considerable contribution to crime counteraction, they are invaluable for both theory and practice.