The essence and problems of substantiating certain types of decisions in criminal proceedings

The article considers problems of substantiating certain types of decisions in the criminal process. The author’s views are based on recent changes in the criminal procedure legislation of the Republic of Kazakhstan and the existing experience of the Russian Federation. The article focuses on provisions of the current criminal procedure code of the Republic of Kazakhstan. The author refers to Russian proceduralists whose works are devoted to the problems of studying the validity of procedural decisions at the pre-trial stage. The author indicated types of decisions, which are not recognized as criminal procedural, but for which justification should be a mandatory criterion according to the criminal procedural legislation of the Republic of Kazakhstan. The article provisions justify the need to enshrine the definition of «reasonableness» in the Criminal Procedure Code of the Republic of Kazakhstan as a mandatory requirement that must be met when taking decisions by the prosecuting authorities.