1994年度上海市未破的凶杀案件大幅度上升,全市共有56起,为历年来之最。在这些案件中,抢劫杀人的为26起,占46.4%;劫车杀人的为3起,占5.4%;因奸情杀人的为8起,占14.2%;因纠纷杀人的为3起,占5.4%;仇杀为3起,占5.4%;性质不明的为13起(其中包括5起碎尸案和4起无名女尸案),占21.4%。这些案件有其共同点,但又不尽相同,犯罪分子的作案手段不会是简单的重复,总想千方百计地逃避罪责。杀人的具体手段是有效地实现杀人动机与目的途径。犯罪分子为了致人死地常常根据当时当地和被害人的具体情况,结合自己掌握的犯罪工具、技能、知识水平和身体条件,设计出杀人的方式方法,并付诸实施。在案件发生后,侦察人员和侦察对象双方都处于运动之中。案件事实的已知与未知,侦察条件的有利与不利,破案工作的主动与被动,随时都在变化。如把握不当,战机瞬间即逝,给破案工作带来意想不到的困难。我们通过对这些未破凶杀案件的剖析,可归纳出以下几个方面进行分析探讨: In 1994, the number of unprovoked homicide cases in Shanghai witnessed a sharp rise, with a total of 56 in the city, the most in recent years. Among these cases, 26 were robberies and murders, accounting for 46.4%; 3 were car-homicides, accounting for 5.4%; 8 were murdered because of adultery, accounting for 14.2%; 3 were murdered because of disputes, accounting for 5.4%; revenge for 3, accounting for 5.4%; unknown nature of 13 (including 5 broken corpses and 4 unknown dead women), accounting for 21.4%. These cases have their similarities, but they are not the same. Criminals can not simply repeat crimes and always try to escape from their guilt by every possible means. Specific means of killing are the motivation and purpose of effective killings. In order to cause death, criminals often design ways and means to kill people according to the local conditions and the victim’s circumstances at that time, combining their own criminal tools, skills, knowledge and physical conditions. After the incident, both the reconnaissance officer and the reconnaissance object are in motion. The known and unknown facts of the case, the advantages and disadvantages of the reconnaissance conditions, the initiative and the passiveness of the case-detection work are changing at any time. If mishandled, fighter fleeting, to bring unexpected efforts to solve the case. Through the analysis of these unbroken homicide cases, we can summarize the following aspects for analysis and discussion: