疑难案件,是指在案件侦查审理过程中,材料不全、事实不清、证据不足、短时间不易攻克的案件。形成疑难案件的主观方面原因: 搜集证据不细致,保管不善搜集证据不细致或者对收集到的证据不妥善保管,这是形成疑难案件的一个很重要的原因。例如,有的侦查人员对现场勘查不细,该提取的痕迹物证未能及时提取,对已提取的痕迹物证不及时检验、鉴定,不妥善保管,甚至造成丢失、变形、混杂、腐烂变质,失去应有的价值,再次取证又失去了条件,以致形成疑难案件。 Difficult cases, refers to the case in the investigation process, incomplete materials, facts are not clear, evidence is not enough, a short time difficult to overcome the case. The subjective aspects of the formation of difficult cases Reasons: the collection of evidence is not detailed, improper custody Collecting evidence is not meticulous or not properly collected evidence of custody, which is difficult to form a very important reason. For example, some investigators did not make detailed on-site surveys, and the evidence of the extracted traces failed to be extracted in time. The evidence of the extracted traces was not checked, appraised, improperly stored, or even lost, deformed, mixed, decomposed and lost Should have the value of evidence again lost the conditions, resulting in the formation of difficult cases.