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命案现场血迹既是痕迹又是物证,血迹的双重特性也充分反映出其在命案现场上的重要地位和作用。作为痕迹,它能充分反映出被害人被害时所处的状态和受伤以后的活动过程以及案犯触及血迹后的活动轨迹;作为物证,血迹是最重要的法医物证,刑事技术部门可以利用血迹的生物学特性,来确定血迹的种属、血型、性别以及DNA同一认定等。因此,研究命案现场中血迹的特点以及血迹的发现和利用具有重要的意义。
The bloodstain at the murder scene is both a trace and a material evidence. The dual characteristics of bloodstain also fully reflect its important position and role on the murder scene. As a trace, it can fully reflect the victim's state when victimized and the course of the activity after the injury, as well as the path of activity after the criminal touches the blood; as a physical evidence, blood is the most important forensic evidence, and the criminal technology department can make use of the biology of blood Characteristics, to determine the species of blood, blood type, gender and DNA identity and so on. Therefore, the study of the characteristics of bloodstains and the discovery and utilization of bloodstains are of great significance.