These two case reports are of fatal injuries from less-lethal weapons (tear gas guns) using pebbles as an unconventional ammunition. Reported here are the fatal outcomes of two 19-year-old males, one with head trauma and the other with abdominal trauma. They were admitted to the ED and subjected to immediate exploratory operations, but they passed away. On autopsy, the first case demonstrated a right frontal bone fracture with subdural hemorrhage and a 3 × 2.5 cm pebble retained in the skull. The second case showed severe liver laceration in close vicinity to a cubical pebble (3.2 × 3 cm). The mechanical forces involved in skull fracture and autopsy are discussed. In the current cases, the relatively larger weight and size together with the surface configuration of the pebble projectile were the main influential factors that contributed to the severity of damage and fatality.These case reports are a working example of the effect of the mass of projectiles in increasing the power of penetration. The direct shooting to the head and the abdomen together with the misuse of these weapons are capable of inflicting fatal injuries.

这两起案例报告都是使用卵石作为非常规弹药的低致命性武器（催泪瓦斯枪）造成的致命伤害。这里报道的是两名 19 岁男性的死亡结果，其中一名头部外伤，另一名腹部外伤。他们被送往急诊室并立即接受探查手术，但他们去世了。尸检显示，第一例患者右额骨骨折，伴有硬膜下出血，颅骨内留有 3 × 2.5 厘米的卵石。第二个病例在立方体卵石（3.2 × 3 厘米）附近出现严重的肝脏撕裂伤。讨论了颅骨骨折和尸检中涉及的机械力。在目前的案例中，相对较大的重量和尺寸以及卵石弹丸的表面结构是造成严重损害和死亡的主要影响因素。这些案例报告是弹丸质量影响的一个有效例子。以增加穿透力。直接射击头部和腹部以及滥用这些武器可能会造成致命伤害。