□据选择杀人时机判断选择合适的杀人时机,是犯罪分子预谋作案的一个重要方面。若杀人时机选择准确,多是熟人作案。如被害人刚存放在家中巨未即被抢劫杀害;乘被害人患病服药期间进行投毒;在被害人外出或返回途中,事先潜伏在必经路线,突然袭击等都反映出熟人作案的心理特点。□据杀人现场所处环境分析如果杀人第一现场较偏僻,被害人生前并不熟悉这一环境,在排除了被绑架协迫或拖拉到现场的情况后,多是被凶手哄骗至此;如果现场发现两人坐卧攀谈迹象或死者被害前经过精心打扮象去赴约,则更可能说明是被熟人杀害,多系因恋爱、奸情关系破裂引起杀人。□据现场物品状态分析待客住宿迹象:死者家中饭桌上若有茶水、碗筷酒菜、糖果等,有可能凶手与死者共同进餐、攀谈;据被窝、铺盖分析凶手若与死者共同住宿,可说明凶手与死者关系密切,多是朋友、同学、战友、亲戚关系等。现场物品变动变化情况:在盗窃、抢劫杀人案中,若现场翻动很乱,甚至价值高的物品未找到,说明凶手对被害人或现场不太熟;反之,作案目标特准,尤其财物存放位置隐蔽,作案人不经过仔细搜寻而 □ It is an important aspect of the criminals premeditated crimes that they choose the right time to kill according to the timing of their choice of murder. If the killing time to choose accurate, mostly acquitted. If the victim just left at home, the giant is not robbed and killed; take the victim during the illness taking drugs; in the victim’s go out or return on the way, before the latent route must be, a sudden attack reflects the psychological characteristics of acquitted people committing the crime. According to the environmental analysis of the scene of the murder If the murder of the first scene is more remote, the victim was not familiar with the environment during his lifetime, ruled out abducted co-ops or dragged to the scene, mostly by the killer to this point; if the scene found When they sit down and talk to each other or the deceased is carefully dressed like a deceased before going on an appointment, they are even more likely to be acquitted by an acquaintance and more likely to be killed because of a broken relationship between love and adultery. □ According to the status of the scene analysis of hospitality accommodation signs: the deceased home if the table tea, chopsticks wine, candy, etc., the murderer and the deceased may eat together, chat; according to the bed, bedding cover murderers and the dead together, may explain Killer and the dead are closely related, mostly friends, classmates, comrades, relatives and so on. Changes in changes in the scene items: In the case of theft, robbery and murder, if the site flipped messy, or even high value items not found, indicating that the murderer is not familiar with the victim or the scene; on the contrary, crime targets specific, in particular, the hidden property storage location , The perpetrator did not search it carefully