刑事技术2016，Vol.41Issue(4)：274-278,5.DOI:10.16467/j.1008-3650.2016.04.004
平板玻璃上射击痕迹分析
Analysis of Shooting Marks on Flat Glass
摘要
Abstract
ABSTRACT:Damaged glass, out of shooting (or hitting), frequently occurs in crime scene. Although the priority is to ascertain the shooting device’s type when such scene is encountered, yet it is dififcult to accurately conifrm the weapon used because of the prevailing presence of many sorts of shooting devices and bullets (or pellets) to result in very rare veriifcation from actual cases. Therefore, the judgment is always relied on the experience of experts. In this paper, mark evidence on lfat glass was made and investigated from several types of weapon including slingshot, crossbow, air gun, ball gun and pistol. Simulated shooting test was targeted at lfat glass (thick of 3.5-5.0 mm) with the above weapons under different conditions, producing 191 pieces of cracked glass samples. The patterns on the cracked glass, generated by different weapons and projectiles, were carefully examined and compared. Experimental data show that the degree of glass damaging is stable when both the velocity of the projectile and the used pellet matching to some weapon are relatively ifxed. According to the extent of damage, the patterns of marks on glass are divided into ifve categories, with their majority showing combination of two and more categories. Based on the probability of occurrence, category combination and size of the marks, the characteristic of the marks is concluded. Projectiles of stone, steel-ball and gun bullet can be distinguished by the shape of the holes produced on the cracked glass. The caliber of pellet by slingshot, crossbow or ball gun can be judged by the size of the crack. The radial crack by air gun especially tends towards bending. The types of the applied weapons can be deduced by the pattern of the marks. The inlfuential factors on stability of the mark patterns, and the projectile’s track can be ignored but the lfat glass’ characters, such as the size and thickness, must be taken into analyzing the diameter of bullet (or pellet) hole. The discovery here may provide reference for more reifned inquisition about mark evidence on the damaged lfat glass so as to determine the shooting device quick and accurately.关键词
痕迹/射击痕迹/形态/玻璃Key words
mark evidence/shooting mark/pattern/lfat glass分类
社会科学引用本文复制引用
周毅锦,周腾,李振健..平板玻璃上射击痕迹分析[J].刑事技术,2016,41(4):274-278,5.基金项目
江苏省重点学科建设专项经费 （）
