You prepared a memorandum of law for the firm’s trial attorney, and a brief for the court that was used in the case that started today. Closing arguments will be made tomorrow. You now discover case...

You prepared a memorandum of law for the firm’s trial attorney, and a brief for the court that was used in the case that started today. Closing arguments will be made tomorrow. You now discover case law that is favorable to the other side and that effectively overturns the case law you used in the memorandum of law and brief. What do you do? Are there any ethical issues? Explain fully.