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在盗窃电缆线案件中,如何利用现场遗留的断头,及断头上遗留的痕迹进行分析判断犯罪工具种类以及犯罪工具的特征,成为公安一线民警必须面对的问题。本文对线缆剪、断线钳以及钢丝剪剪切电线缆的痕迹进行比较性研究,从材料与工具刃口各部位相互作用的性质出发,对工具结构、断头侧面形态及坡面留痕特点分别进行观察与分析,通过不同工具留痕特点的比较,对痕迹的稳定性及其出现率进行更深层次探讨,并从本质上分析形成痕迹的不同理论原因。
In the case of the theft of cables, how to use the broken ends left over from the scene and traces left over from the broken ends to analyze and judge the types of criminal tools and the characteristics of criminal tools has become a problem that the frontline public security police must face. In this paper, the comparative studies on the traces of cable cutter, bolt cutter and wire cutter cut cable are carried out. Based on the nature of the interaction between the material and the cutting edge of the tool, the tool structure, The characteristics of the marks were observed and analyzed respectively. Through the comparison of the characteristics of the marks left by different tools, the stability of the marks and the occurrence rate of the marks were discussed in more depth. The different theoretical reasons of forming the marks were analyzed from the nature.