In a brief Introductory Overview, present a  (<5 paragraph ) description of the facts / events/ key characters and ethical challenge of the case.
Then address the following:
What is the action/ decision that the protagonist believes is right?
Whats at stake or at risk for the key parties?
What are the main arguments against this course of action?  What are the reasons & rationalizations that must be addressed?
What are the most powerful & persuasive responses to reasons/ rationalizations? To whom should the argument be made?  When?  In what context?  What data is needed? What allies? Etc.
Finally, in a Concluding paragraph, summarize the main points of your analysis, referring directly to the ethical challenges you identified in your Introduction.