Abstract
This scientific article analyzes the key aspects of the court's investigation and evaluation of forensic expert opinions as evidence in criminal cases. It examines the legal framework established in the Criminal Procedure Code of the Republic of Kazakhstan that defines the status of expert opinions and the criteria for their admissibility and reliability. Special attention is given to the practice of evaluating opinions from forensic medical, biological, chemical, and video technical examinations when considering cases of murder, sexual offenses, illegal drug trafficking, and other criminal offenses. The article emphasizes that an expert opinion plays a crucial role in establishing the circumstances of the case, but the court is obligated to verify its scientific validity, completeness of the investigation, and compliance with procedural norms. Based on the analysis of Kazakhstan's and foreign experience, the author concludes that there is a need for further improvement of forensic expert activities, enhancement of expert qualifications, and the introduction of new methodologies and technologies. It is proposed to strengthen the organizational and legal foundations of forensic examination and increase its independence, which will ensure more fair and objective justice.