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物证质量对多数刑事案件的定案起着至关重要的作用,但实践中无论物证的发现、固定环节,还是检验、鉴定、保全环节,均存在出错的空间。物证质量不高的原因存在于观念、规范和操作等多个层面。要提高物证质量,就必须建立取证质量的全程监控机制:在取证前做好制度、人力等方面的准备;在取证过程中完善第三方监控措施,引入对方监控机制,并全程记录取证过程;取证后通过非法证据排除、补充侦查等方面的规则或制度避免有瑕疵的物证被采纳,并为寻找新的替代性证据提供可行途径。
The quality of physical evidence plays a crucial role in the finalization of most criminal cases. However, in practice, there is a space for error in discovering or fixing physical evidence, or in testing, identifying and preserving links. The reasons for the low quality of evidence exist in many aspects such as concept, standardization and operation. To improve the quality of physical evidence, it is necessary to establish a full monitoring mechanism for the quality of forensics: to make preparations for systems and manpower before obtaining evidence; to improve third-party monitoring and control measures during the process of forensics, to introduce monitoring and control mechanisms from the other side and to record the process of forensics; After the rule or system of eliminating or supplementing the investigation through illegal evidences is adopted to avoid the defective evidence being adopted and provide a feasible way for finding new alternative evidences.