摘要
目的研究“软硬开”工具开启一字双排曲线槽锁遗留的痕迹特征,为检验“软硬开”工具开启一字双排曲线槽锁具痕迹提供参考。方法使用“软硬开”工具开启一字双排曲线槽锁具制作实验样本,拆锁进行痕迹检验,通过显微镜观察,对照空白样本和使用样本的情形,寻找“软硬开”工具开启一字双排曲线槽锁具的痕迹特征。结果在实验样本中,部分锁具从外观上可直接观察到形态异常,如锁孔开口处变形、锁芯内有残留物、锁具套筒出现裂痕等;锁芯匙槽内壁均有擦划线条痕迹;圆头弹子以及平头弹子随机出现明显刮擦痕迹、变形乃至断裂的情况;部分锁芯、锁体弹子孔有明显变形;部分锁内滑块和边柱上出现印压痕迹,其中在以铡刀片钢珠组合作为边柱制锁结构的锁具中,铡刀片均有明显变形;锁具套筒内壁上的钢珠划痕明显。空白样本和正常使用样本均无以上情形出现。结论本文通过实验明确了“软硬开”工具开启一字双排曲线槽锁所留痕迹出现的部位、形态及分布情况,总结出“软硬开”工具开启一字双排曲线槽锁痕迹的检验要点。
Objective To scrutinize the traces left on the pin-vane mortised locks undergone with soft and hard unlocking tools so as to provide a reference for identifi cation of such a new technical unlocking.Methods Three different brands of pinvane mortised locks were marked into 3 groups(A,B,C),with each group having 10 locks among which one piece was left intact as the blank sample for its group and the other nine ones were operated with keys to imitate locking and unlocking.Among the nine locks operated,one was handled with its genuine key as the control sample for normal using and the rest 8 ones were technically opened with the soft and hard unlocking tools.Every one of the locks mentioned above was individually observed under microscope.Results Morphological changes were observed directly on the appearance of some tested locks,revealing deformation of the keyholes,residua left on the cylinder plugs,broken marks on the cylinder and the other abnormal signs.Traces on the key slot were among the most stabilized characteristics.Some of the round-head and/or fl at-end pins were exposed of cutting marks,deformation or even fractures,with the relevant pin holes appearing morphological changes,too.Marks were also found on sliding blocks and columns,with the latter even likely bending when they were really a blade.In the C group,marks caused from steel balls appeared much more obvious inside the cylinder of tested locks than those of the normal-using lock.Conclusions The traces left with soft and hard unlocking tools have been here demonstrated of their positions,patterns and interspersion on the pin-vane mortised locks,with the main points of such kind of examination being concluded.Whether a pinvane mortised lock has been opened with one soft and hard unlocking tool could get reference from this survey.
作者
王梓入
王军文
周子芮
WANG Ziru;WANG Junwen;ZHOU Zirui(Managing Cernter of Forensic Science Institute of Shanghai Public Security Bureau,Shanghai 200083,China;Technical Faculty of Criminal Investigation Detachment of Changsha Public Security Bureau,Changsha 410114,China;Criminal Investigation Section,Furong Sub-bureau of Changsha Public Security Bureau,Changsha 410024,China)
出处
《刑事技术》
2022年第3期268-274,共7页
Forensic Science and Technology
