My objective here is threefold: (1) to explain these ethical rules and demonstrate how each is in conflict with longstanding principles of federal criminal law; (2) to explain why these rules are illegitimate, both as rules of ethics and as rules of positive law; and (3) to offer some observations on how the dispute over these rules can sharpen our thinking about the nature and proper limits of ethical rules governing lawyers.
Frank O. Bowman III, A Bludgeon by Any Other Name: The Misuse of "Ethical Rules" Against Prosecutors to Control the Law of the State, 9 Geo. J. Legal Ethics 665 (1996)