“Tactics of special investigation actions performance. Criminalistic tacticsâ€�: the scientific-practical guideline analyses the theoretic propositions of criminalistics, as well as the conceptual themes included in the program of “Criminalisticsâ€�, “Investigation tacticsâ€� courses. We talked about the new book with its author-the professors of 91ÊÓÆµ chair of criminal processing and criminalistics Vahe Yengibaryan.