Abstract
The article discusses certain issues related to the protocol form of pre-trial investigation of criminalcases. A hypothesis is tested that defines protocol proceedings as a simplified (accelerated) form of pre-trialinvestigation used in criminal proceedings in the Republic of Kazakhstan. A comparative analysis of theprotocol form of pre-trial preparation of materials has been carried out. This form was in force in the 1959Criminal Procedure Code of the Kazakh Soviet Socialist Republic. The simplified procedure for pre-trialproceedings was introduced by the Criminal Procedure Code of the Republic of Kazakhstan in 1997.The accelerated procedure for pre-trial investigation has been in force in the criminal procedurelegislation of the Republic of Kazakhstan since 2014. The authors came to the conclusion that the protocolform is a full-fledged procedural production of the pre-trial investigation. This form practically does notcontain elements of simplification, and the introduced changes and additions have brought to naught theaccelerated procedure. This led to the fact that most of the cases are terminated due to violation of thetimeframe for the investigation.