1案例 　　例 1：某男， 68岁，农民。死前情绪低落。某日晨被人发现死于值班室。现场门窗闩紧，室内物品陈设较整齐，地面有大量血泊及碎玻璃片，桌上有带血的铁钉三枚，砖块一个，桌前椅子上有带血的铁片一枚，地面和床上有血鞋印，与死者所穿鞋印吻合。门后有一痰盂，内有大 Case 1: A male, 68 years old, farmer. Depression before death. One day morning was found dead in the duty room. The windows and doors on the site were tight and the furnishings were neatly arranged. There were a large number of bloodstains and broken glass on the ground. There were three nails with blood on the table, one brick, one iron plate with blood on the front desk, There are blood-stamped on the bed, with the shoes worn by the dead fit. There is a spittoon behind the door, there is a large