The impact of deposition area and time on Touch DNA collected from fabric

IF 0.5 Q4 GENETICS & HEREDITY Forensic Science International: Genetics Supplement Series Pub Date : 2022-12-01 DOI:10.1016/j.fsigss.2022.09.017

Salem K. Alketbi , W. Goodwin

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引用次数: 2

Abstract

Touched items at crime scenes are frequently analysed to help link suspects to crimes, for example, Touch DNA is collected from victims’ clothes in cases such as sexual assault, homicide, theft etc. Tape lifting is the preferred collection method of choice for trace DNA from clothes, fabric items and porous surfaces such as paper, therefore this study investigated the impact of deposition area and time on Touch DNA collected from fabric using minitapes. The amount of Touch DNA collected from the fabric was significantly affected by deposition area (p < 0.05), time (p < 0.05) and the interaction between the deposition area and time (p < 0.05), with the quantity of DNA collected decreasing over time. Also, the buttocks area of the trouser compared to the chest area is more prone to friction from an activity like repeatedly sitting on different surfaces which reduces the amount of Touch DNA available. In conclusion, it is more effective to collect trace DNA from victim clothes as soon as possible after the crime is committed.

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沉积面积和时间对织物上采集的触摸DNA的影响

犯罪现场的触摸物品经常被分析，以帮助将嫌疑人与犯罪联系起来，例如，在性侵、凶杀、盗窃等案件中，触摸DNA是从受害者的衣服上收集的。胶带是从衣服、织物和多孔表面（如纸）上采集痕迹DNA的首选方法，因此，本研究采用微型计算机研究了沉积面积和时间对从织物中采集的Touch DNA的影响。从织物收集的Touch DNA的量受到沉积面积（p＜0.05）、时间（p＜0.05-）和沉积面积与时间之间的相互作用（p＜0.05%）的显著影响，收集的DNA的量随着时间的推移而减少。此外，与胸部区域相比，裤子的臀部区域更容易因重复坐在不同表面等活动而产生摩擦，这会减少可用的Touch DNA量。总之，在犯罪后尽快从受害者衣服上采集微量DNA更有效。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Forensic Science International: Genetics Supplement Series Medicine-Pathology and Forensic Medicine

CiteScore

0.40

自引率

0.00%

发文量

122

审稿时长

25 days

期刊介绍： The Journal of Forensic Science International Genetics Supplement Series is the perfect publication vehicle for the proceedings of a scientific symposium, commissioned thematic issues, or for disseminating a selection of invited articles. The Forensic Science International Genetics Supplement Series is part of a duo of publications on forensic genetics, published by Elsevier on behalf of the International Society for Forensic Genetics.