Thomas - I can't help but feel that you're using words and definitions (aka splitting hairs) to defend something that should not be defended here. With enough effort, almost any unethical behaviour can be made to look justifiable given the circumstances, the complexity of the world, etc etc.
In my experience, I've found that a much quicker test of ethics is using the incredibly powerful subconscious brain that we have evolved with, which allows us to make pretty quick decisions about issues of right and wrong. In this case, it's pretty clear which side is wrong and needs to be brought to task and examined more closely. In no way can you possibly suggest that the level of mass spying that the NSA/GCHQ are engaging in is on the right side of the ethical line in the sand and retain any credibility as... as a human being.
As for the hair-splitting, I can engage in that too:
> So, my refined question would be, in what sense does this executive branch have secret rules or norms that apply to the criminal justice system?
Because the executive branch created the secret spying system and then allowed it to feed into the criminal justice system as a secret source of information. Whether or not they knew about the "parallel construction" (which I prefer to call "lying to the judge's face"), they were an essential element of it. Probably they knew, given how sensitive it is.
Irrespective, though, these people have done nothing to earn your staunch support. Have they?
It's not a case of innocent before proven guilty. First of all, we're talking about a state, not a person. Secondly, there is overwhelming evidence of guilt.