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白银奸杀案疑凶工友:他看红衣女人的眼神很奇怪(图)

2016-08-30 02:14:29   北京晨报

2004年,警方悬赏20万元缉拿凶手。据了解,从1988年第一起案件开始,在28年这么长的时间之后,在茫茫人海之中能锁定犯罪嫌疑人高承勇,DNA-Y染色体成破案的关键。

中国人民公安大学侦查与反恐怖学院院长陈刚介绍:“DNA存在于每一个细胞核里,在白银系列案件中,警方提取了他的精斑,这也是他的体液,体液里面有细胞和细胞核,因此可以提取DNA进行检验。”

DNA-Y染色体又是什么?陈刚介绍,DNA-Y染色体实际上是一种父系遗传的基因,DNA-Y染色体是父系一代代传下来的,从DNA-Y染色体可以圈定一个家族族谱范围。

据了解,此案中首先是高承勇家族中某一个人被外地警方抓获后,在比对基因时发现此人的基因与犯罪现场所提取到的基因相似度很高,办案机关在海量的数据信 息之中找到了高承勇相关的关键信息,提取了他的指纹和DNA与当年命案现场留下的指纹和DNA进行信息比对,就此确定了他的嫌疑人身份。

■案件进展

高承勇请求

捐献器官

在央视记者第一次采访到犯罪嫌疑人高承勇时,高承勇有一个请求:捐献自己的器官。对此陈刚分析,因为年龄不同,犯罪嫌疑人的心理可能会有一些变化,“可 能年纪大了之后,会反思、会有良心发现”。另外,陈刚还认为,犯罪嫌疑人可能知道自己罪不可赦,想在死之前挽回一点,给公众稍微留点好印象。

北京晨报特派记者

张静雅黄晓宇

文并摄

责任编辑:李东舰 CN031
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