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1992年9月22日,湖北省老河口市市委宾馆东楼313房内,发生一起特大麻醉抢劫案件,两名案犯诱使3名受害人喝下掺有麻醉药的咖啡,劫走43950元现金逃之夭夭。犯罪分子,在逃跑之前清洗了受害人用过的玻璃杯、刷洗了地面。经技术人员细致搜查,提取了案犯隐藏的、来不及带走的“必是”固体饮料一罐,“密桔”罐头空瓶一个,从不同角度,用不同光照发现上面有潜在手印。由于案情重大,能够做直接证据的也许就是这潜在指纹,一着不慎,将造成不可挽回的损失。经过认真的分析、探讨和在同类客体、同样条件下的试验结果,决定对上面两类提取物品采用不同的技术处理。(1)“必是”固体饮料罐盒,因为其外围粘了一圈带有各种色彩的广告纸,而纸张对人体汗液中的水分吸收较快,采用粉末刷显效果不佳,还容易破坏潜在纹线和细小特征。使用“502”密封熏显方法,显现出两枚清晰的手印;(2)
On September 22, 1992, a case of extra-large anesthesia robbery occurred in Room 313 of the East Building of the Municipal Party Committee Hotel in Laohekou, Hubei Province. Two of the perpetrators lured three victims to drink coffee mixed with narcotic drugs and robbed them of 43950 yuan in cash Get away. The criminals cleaned the glass used by the victim and scrubbed the ground before fleeing. The technicians carefully searched, extracted the case of hidden, too late to take “must ” a can of solid beverage, “tangerine ” canned empty bottles, from different angles, with different light found above potential fingerprints . Due to the seriousness of the case, the potential fingerprinting that may be able to make direct evidence may be an irreparable loss due to carelessness. After a careful analysis to explore and similar objects, under the same conditions of the test results, decided to extract the above two types of products using different techniques. (1) “must ” solid beverage cans, because of its peripheral stick with a circle of advertising paper with a variety of colors, and paper on the human body to absorb moisture in the sweat faster, the use of powder brush ineffective, It is also vulnerable to potential streaks and small features. Use “502” seal smoked significant method, showing two clear handprints; (2)