Hungarian Institute for Forensic Sciences, Mosonyi utca 9, Budapest, 1087, Hungary.
Forensic Sci Int. 2020 Nov;316:110524. doi: 10.1016/j.forsciint.2020.110524. Epub 2020 Oct 6.
In burglary cases, the skeleton keys used by burglars often leave tool marks that can not be identified. Hence, forensic trace experts can only provide investigating authorities with useful information by categorizing the lock opening method of pin tumbler lock cylinders and defining the class characteristics of the tool used. It is important to note that as per the standard processes, expensive and more time consuming DNA-tests may not be applied to this evidence type. During the past few years, more and more dimple locks were documented by the police being removed from security doors at burglary scenes and sent to the Hungarian Institute for Forensic Sciences. These dimple locks were made in China with no brand mark, with 6-8 pin tumblers. We noticed previously unknown tool marks on the horizontal keyway, on the face and on the side of the tumblers of most of these dimple locks. We also found fragments of aluminium foil in the bottom of the plugs. Based on this, we came to the conclusion that the burglars work with a new method when opening this type of locks, which required forensic trace experts to introduce a new way of examination. In this study specific data is meant to be presented supporting the observations above. This paper is presenting a new lock opening method and the tool marks left behind. Our purpose was to develop a new method which takes the benefit of a new type of evidence: foil fragments noticed in the cylinder with possible DNA evidence, which was previously unknown by the police. This goes beyond the scope of general investigative findings, allowing a more effective identification of the burglars. We are also going to explicate the results of our DNA tests. Foil fragments having been recorded under sterile conditions brought searchable DNA-profiles in 52 % of the cases. In 55 % of these cases DNA-profiles were matched with suspects' and a series of crimes and groups of criminals were explored. Examining the DNA-profiles that did not match suspects' profiles revealed the presence of victims' DNA in certain cases. The outcomes of our study highlight that collecting victim DNA-samples should be implemented as a default process in cases where a DNA-test is required.
在盗窃案件中，窃贼使用的万能钥匙往往会留下无法识别的工具痕迹。因此，法庭痕迹专家只能通过对弹子锁锁芯的开锁方法进行分类，并定义工具的类别特征，为调查当局提供有用的信息。需要注意的是，按照标准程序，这种证据类型可能不会进行昂贵且耗时的 DNA 检测。在过去的几年中，警方在盗窃现场从安全门上拆除越来越多的酒窝锁，并将其送到匈牙利法医科学研究所。这些酒窝锁是中国制造的，没有品牌标记，有 6-8 个弹子。我们注意到，在大多数这种酒窝锁的水平钥匙槽、弹子的正面和侧面都有以前未知的工具痕迹。我们还在插塞的底部发现了铝箔碎片。基于此，我们得出结论，窃贼在开启这种类型的锁时采用了一种新方法，这要求法庭痕迹专家引入一种新的检查方法。在这项研究中，特定的数据旨在支持上述观察结果。本文介绍了一种新的开锁方法和留下的工具痕迹。我们的目的是开发一种新方法，利用一种新类型的证据：在以前警察未知的圆柱体内发现的箔片碎片，可能有 DNA 证据。这超出了一般调查结果的范围，使对窃贼的识别更加有效。我们还将解释我们的 DNA 测试结果。在无菌条件下记录的箔片碎片在 52%的情况下带来了可搜索的 DNA 图谱。在这些案例中，55%的 DNA 图谱与嫌疑人的图谱相匹配，并对一系列犯罪和犯罪团伙进行了探索。在检查与嫌疑人图谱不匹配的 DNA 图谱时，发现某些情况下存在受害者的 DNA。我们的研究结果表明，在需要进行 DNA 检测的情况下，应将收集受害者 DNA 样本作为默认程序实施。
