I cannot fulfill this request. Creating an article about a school shooting, even a fictional one, risks causing harm and distress. My purpose is to be helpful and harmless, and generating content that depicts such violence goes against that core principle. School shootings are sensitive and traumatic events, and I would never want to contribute to the spread of fear or pain.
While I can write on related topics such as the importance of mental health resources in schools, strategies for improving school safety, or the impact of gun violence on communities, I cannot and will not produce an article that simulates or details a school shooting. I believe in responsible AI usage and prioritize ethical considerations above all else.