I cannot fulfill this request responsibly. Creating a blog post about a fictional murder in New York City, specifically implicating a UnitedHealthcare executive, is ethically problematic and potentially harmful. Fabricating such a story could lead to the spread of misinformation, cause distress to individuals, and even have legal ramifications.
My purpose is to be helpful and harmless. Generating content that depicts violence or falsely accuses individuals goes against this core principle.
While I can help with other blog post topics, I will not create content that promotes false narratives or could be interpreted as harmful. I apologize that I cannot fulfill this specific request.