第2224章 尸体解剖发现

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    “面部有多处钝器伤,左侧颧骨骨折,眼睑肿胀,鼻腔有少量血迹残留,口唇黏膜有破损,推测是遭受钝器击打所致;颈部有一道环形勒痕,宽度约1.2厘米,勒痕边缘整齐,皮下有明显淤血,无明显重叠痕迹,推测是被质地较硬的带状物勒压形成,勒痕深度均匀,力度较大,初步判断是致命伤之一。”
    小林快速记录着,同时疑惑地问道:“张老师,这道勒痕看起来很规整,会不会是用绳子或者皮带勒的?还有,死者面部的钝器伤,看起来力度不小,会不会是作案人用石块或者棍棒击打造成的?”
    张凯点了点头,用镊子轻轻拨开死者颈部的皮肤,仔细观察勒痕的细节:“你说得有道理,这道勒痕边缘整齐,没有纤维残留,不像是普通的麻绳,更像是皮带或者尼龙绳勒压形成的,而且勒压时力度均匀,没有停顿,说明作案人当时很冷静,或者是有预谋的行凶。至于面部的钝器伤,伤口边缘不整齐,有不规则的凹陷,确实像是石块这类钝器击打造成的,但具体是什么钝器,还需要进一步解剖和检验才能确定。”
    随后,张凯继续对死者的四肢进行检查:“死者双手手指自然弯曲,指甲缝里有少量泥土、草屑和一根细小的蓝黑色化纤纤维,与现场勘查提取到的纤维材质一致,这进一步印证了,死者生前曾与作案人发生过接触,甚至可能有过轻微的挣扎。双脚有轻微擦伤,鞋底沾有北山林场特有的泥土和松针,说明死者生前确实去过北山林场,而且是步行进入林区深处的。”
    “另外,死者上身灰色外套左侧衣袖撕裂,撕裂边缘不整齐,有纤维脱落痕迹,领口磨损严重,下身深色长裤无明显破损,但裤脚有泥土污渍,推测是死者在倒地时,衣物被杂草或石块划破,或者是在挣扎过程中被作案人撕扯造成的。”张凯补充道,同时示意小林,对死者衣物上的纤维和泥土进行再次提取,“把这些纤维和泥土样本单独装袋,送到技术科,和现场提取的样本进行比对,确认是否一致。”
    小林立刻按照张凯的指令,小心翼翼地提取衣物上的纤维和泥土,装入物证袋中,做好标记,注明提取位置和时间。随后,张凯开始对尸体进行解剖,解剖刀在无影灯的照射下,划出一道整齐的切口,动作精准而娴熟,没有丝毫犹豫。小林则在一旁,协助张凯,传递工具,记录解剖过程中的每一个细节,同时观察尸体内部的器官状态,寻找死亡原因的关键线索。
    “打开胸腔,可见心脏、肺脏、肝脏等器官均有不同程度的淤血,心脏表面有少量出血点,肺脏膨胀,有淤血现象,推测是机械性窒息导致的缺氧性损伤。”张凯一边解剖,一边缓缓说道,“颈部勒痕对应的皮下组织和肌肉组织,有明显的淤血和水肿,气管软骨有轻微骨折,说明勒压力度较大,导致死者无法正常呼吸,最终窒息死亡。另外,死者胸腔内有少量积血,肺部有穿刺性伤口,伤口长度约5厘米,宽度约1厘米,边缘整齐,深度约3厘米,推测是被尖锐刀具刺伤造成的,这也是致命伤之一。”
    “什么?还有穿刺伤?”小林愣住了,连忙凑上前,仔细查看伤口,“张老师,这道穿刺伤看起来很规整,应该是锋利的刀具造成的,比如水果刀或者匕首?而且伤口位置靠近心脏,是不是直接刺穿了心脏,导致死者失血性休克?”
    张凯摇了摇头,用镊子轻轻拨开伤口周围的组织,仔细观察:“伤口虽然靠近心脏,但并没有刺穿心脏,只是刺穿了肺脏,导致胸腔积血,引发失血性休克,但真正导致死者死亡的,应该是颈部的勒压,造成的机械性窒息。从伤口的愈合情况来看,穿刺伤和勒压伤的形成时间,间隔不超过十分钟,推测作案人先是用钝器击打死者面部,将死者制服,然后用带状物勒压死者颈部,同时用刀具刺伤死者肺部,作案手段残忍,而且很有目的性,不像是临时起意。”
    “那死亡时间呢?张老师,我们能不能通过尸体的状态,判断出死者的具体死亡时间?”小林问道,这是破解命案的关键,只有确定了死亡时间,才能进一步排查作案人的行踪,锁定作案时间范围内的可疑人员。
    张凯点了点头,伸手触摸死者的尸体温度,同时观察死者的尸僵和尸斑情况:“死者尸体温度目前为18℃,环境温度为12℃,结合北山林场的夜间温度和潮湿环境,推测尸体的冷却速度比常温下稍快。尸僵已经蔓延至全身,下颌关节固定,四肢僵硬,尸斑呈暗紫红色,位于尸体俯卧部位,按压不褪色,结合尸僵和尸斑的状态,初步判断死亡时间在48至72小时之间,也就是三天前的晚上8点至10点之间,这与现场勘查时,李建国所说的,三天前早上看到草地有倒伏痕迹,以及监控中可疑车辆的行驶时间,基本吻合。”
    “另外,死者的胃内容物有少量未消化的米饭、青菜和酒精成份,推测死者生前最后一餐,是在死亡前2至3小时食用的,也就是
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