The monograph reflects an integrated approach to the theory of evidence. In addition to procedural issues, the logical and psychological foundations of proof, information processes in proof, the relationship and connection between proof and operational investigative activities, and current problems of individual stages of the proof process are considered. Particular attention in the work is paid to the use of evidence - an insufficiently researched stage of proof. For scientists, specialists of inquiry and preliminary investigation bodies, prosecutors, judges, lawyers, teachers and students of law schools.