The monograph is devoted to a comprehensive review of the problems of pre-trial evidence collection as one of the stages of the general procedural mechanism aimed at establishing the circumstances relevant to the criminal case. The essence, methodological basis and system of investigative actions, forensic examinations and other procedural methods of collecting evidence that make up the modern arsenal of bodies of inquiry and preliminary investigation are investigated. The main cognitive and security technologies used in conducting investigative and other procedural actions are highlighted. The problems of the theory and legal regulation of the general rules of their implementation, the procedural status of their participants, fixing their progress and results, judicial control over their production are reflected; the actual problems of investigative inspection, examination, search, interrogation, confrontation, forensic examination, as well as the presentation, demand and seizure (seizure) of objects and documents are considered. Special attention is paid to the applied aspects, the analysis of errors and difficulties that arise in modern law enforcement practice, and possible ways to overcome them are proposed. For researchers and practitioners, teachers, postgraduates( adjuncts), students, as well as anyone interested in topical issues of criminal procedure law and criminology.