利用颅骨枪弹创骨折类型推断射击方向和顺序的实验

Experimental study of deducting the direction and the sequences of the gun shoot according to the gun shot wound shape

建立利用颅骨枪弹创骨折类型推断射击方向和顺序的方法。使用国产五四式7．62mm口径手枪及五六式7．62mm口径半自动步枪，以3m的距离2次射击16具尸体的头颞部及枕部，造成颅脑贯通创，制成颅骨枪弹射入、出口各32例，并根据定位标记进行观察。结果显示：颅骨枪弹创骨折形态可分为带有斜面的孔状骨折，锁孔状骨折，放射状骨折和环状隆起骨折4种类型，其出现多见于低速枪射击，并与射击方向和顺序有直接关系。根据颅骨枪弹创骨折类型可推断射击方向和顺序。

For the purpose of deducting the gun shot direction and the sequences by cra-nial gunshot wound fracture patterns, cranial perforating gunshot wounds were made on six-teen corpses by shooting at the corpse's occipital and temporal bones with 7.62mm pistoltype 54 and 7. 62mm semiautomatic rifle type 56 at a distance of three metres twice. Thirty-two cranial gunshot entrance wounds and thirty-two exit wounds were studied. The resultsshowed that there were four types of cranial wound fracture as with the slope edge, key-holdfracture, radial fracture and circular bulging fracture, which werg formed by shooting withlow velocity gun. The forms 0f the gunshot entrance wounds were directly relatea to theshoot direction and sequence. This study provides a method for deducting the shooting direc-tion and sequence by cranial gunshot wounds.