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让事实说话:帮死者发声 法医叶泸键7年鉴出百名疑犯

2017-09-11 22:02:21   央广网

央广网重庆9月11日消息(记者陈鹏)“我父亲都走了,你们别磨蹭了,抓紧出具死亡证明,我们等着处理后事”!

“你父亲根本不是自然死亡,是被杀害的!”还没等大家反应过来,叶泸键在现场的第一句话,着实让死者家属吓了一跳。

6小时后,尸检结果显示,老人是的确属于外力造成窒息死亡,根据叶泸键的结论,重庆九龙坡警方立即启动命案侦查机制,13小时后,嫌疑人张某、秦某在重庆江津被成功捉获。

这是2010年九龙坡区公安分局刑侦支队技术大队民警叶泸键第一次勘查现场的场景。在过去的7年时间里,通过现场勘查和技术比对,先后捉获各类犯罪嫌疑人上百名,支撑破案1400余件,其中包括近十件十余年未破的积案。

迎难而上:上百个瓶子抽丝剥茧 24小时找出真凶

2013年3月,九龙坡白市驿某村一女子在出租屋遇害。此案发生在人员居住密集和出租非常普遍的城中村,如不迅速破案,很可能对居民造成恐慌。因此,迅速破案成为九龙坡警方不可推卸的重大责任。分局刑侦支队庚即成立专案组,作为现勘组组长的叶泸键压力巨大。

房间只有10平方,屋内只有一张床,一张桌子和一个简易衣柜,看起来非常简单的现场,但屋内被褥、衣服被丢掷一地,受害人身下的床单、死前穿着的衣服全部消失,房间内血迹被清理的非常干净、地面到处都是类似酒精的物质。“看来嫌疑人具有非常强的反侦察能力,现场明显是布置式凌乱,我们碰上了一个难对付的家伙”,这是叶泸键看到现场的第一反应。

经过认真细致的勘查,在中心现场和叶泸键预估的一样,嫌疑人没有给警方留下一个有效线索,经过周边询问和监控调取,也没有获得一个目击者和有效视频。案件一时陷入僵局,此时的叶泸键冷静分析:“在这个布置式现场,嫌疑人还是留给了我们三个线索,现在我们要做的就是顺藤摸瓜”。

“从受害人身上没有提取到任何痕迹,屋内如此多酒精物质是否就是嫌疑人用来清理痕迹的工具呢?根据估算,现场至少有5升酒精类物质,那就先把案发现场周围的所有瓶子找回来”。经过查找,案发现场周边一公里内的136个酒瓶和饮料瓶被带回。

现场床单、死者生前穿着的衣物、捆绑的工具全部消失,而且嫌疑人躲过了所有的视频监控,那嫌疑人极有可能是先蹲守、后作案,而且蹲守地点一定是能够直接看到受害人出入的地点,按照叶泸键的思路,民警再距离案发现场500米左右一处废弃堆置物发现了蛛丝马迹,地上集中留存的十余个烟蒂和使用过胶带让民警看到了破案的希望,结合受害人行走路线和现场情况分析,该处应该就是嫌疑人蹲守的地方。在提取现场13个烟蒂和一条长1米使用过的胶带后,叶泸键立即和同事返回实验室进行检验,其中4个烟蒂、两个矿泉水瓶子和胶带发现嫌疑人线索,并借此迅速锁定犯罪嫌疑人李某。专案组立刻对李某实施抓捕,24小时候,李某在渝北某宾馆被成功捉获,白市驿3.13杀人案成功告破。

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