评估手上的体液的背景水平
Hayley Douglas1, Isla Fraser2, Gerry Davidson3
1Formerly of Forensic Science Northern Ireland, 151 Belfast Road, Carrickfergus, Co., Antrim, BT38 8PL, Northern Ireland, United Kingdom.
概括
这项研究调查了一般人群中手上的背景体液水平. 结果显示常见的毛发/纤维和唾液存在,血液或精液有限,为法医解释提供了信息.
科学领域:
- 法医科学 法医科学 法医科学
- 人类生物学 人类生物学
背景情况:
- 法医科学家需要对背景体液水平的数据,以便对法庭进行评估.
- 现有的案例工作经验缺乏公布的客观解释的数据.
研究的目的:
- 在一般人群中确定血液,精液,唾液,毛发/纤维和手上的染色的背景水平.
- 提供数据支持法医从业人员对手体液证据的解释.
主要方法:
- 从科学会议代表的手中取体液和碎片样本.
- 使用血液和精液的推定测试,以及唾液的Phadebas®氨酶测试.
- 包括精子头和毛发/纤维的分析.
主要成果:
- 大约三分之一的人手上有毛发或纤维.
- 女性比男性更容易表现出可见的手染色.
- 血液和精液的假定测试呈阴性;然而,约2%的样本含有少量精子头.
- 大多数样本使用Phadebas®氨基酶试验检测出唾液阳性.
结论:
- 通过Phadebas®氨基酶测试检测到的唾液的高患病率凸显了其缺乏特异性的原因.
- 法医从业人员在解释本测试的唾液结果时应谨慎行事.
- 建议RSIDTM-唾液测试作为在法医分析中检测唾液的更合适的替代方案.
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