Ethics

In my section on "government lawyers" I teach the students a little about the torture lawyers.  These are relatively well informed Canadian law students, which means they mostly only have some general knowledge of the issues.  I want to give them one supplemental reading which would, ideally, indicate a) the nature of the legal reasoning engaged in (i.e., that it was dubious); b) the ethical issues around opinions in general; c) the issue of whether this was different because i) it was torture; or ii) they were government lawyers.  Any suggestions?  I have thought of Brad's recent book review and David L's chapter in Legal Ethics and Human Dignity.