警察負責犯罪抗制及維護治安工作的特性使然，經常性配槍值勤，因此經常有需要使用槍枝的機會來面對危機應變的情境。本研究發現，員警在用槍事件之衝擊經驗，主要出現在重大壓力事件創傷反應，感到驚嚇、難過、生氣、遺憾、自責、無助等情緒衝擊、與家人相處的無助與焦慮、行政課責的壓力、媒體傳播的壓力、對於組織憫恤的功能的期待等。文末提出具體可行建議來協助警察組織及警察人員更有制度性地面對創傷事件，以化解創傷帶來的傷害和影響。

The police are responsible for crime prevention, as well as the characteristics of maintaining public security work. They also need to have guns on duty. Therefore, they need to use guns to face the crisis situation. This case study found that after using a gun, the police had a great impact experience, including a traumatic response to a major stressful event, feeling shocked, sad, angry, regretful, self-blaming, helpless, and other emotional shocks, and getting helpless and anxiety with family members, stress on administrative responsibilities, pressure from media, and expects help from police organizations. Finally, this study proposes that in order to assist police organizations and police officers to face traumatic events and to resolve the damage and impact of trauma.