A law school colleague is looking for stuff by philosophers that says something along the lines of "in order for it to be fair to blame/punish/sanction a wrongdoer, it is important that the wrongdoer know in advance of the wrongdoing the rule under which if they do that wrong, they will be subject to blame or punishment." Not quite the same idea, but close enough for his purposes is the idea that it isn't fair to punish someone unless they knew what the rule was prior to wrongdoing.
I take it that something like this is at the heart of lots of control-based theories of responsibility (especially as pertains to the knowledge condition), and I'm pretty sure a bunch of us have said things roughly along these lines. But it ain't obvious to me where to point his attention.
What specific passages/articles/things should he look at?