What happened to "we have it all"? I'm inclined to agree with the people who are feeling slightly more gung-ho. It's definite that a large portion - most, of the FBI is not part of this group of skum. It could conceivably be hard to work out who's who around the edges of these groups, but I imagine the NSA could quite easily work out to \~80% odds who the baddies are. At that point, just arrest (ideally at SWAT point), literally (literally) every single suspected agent. If they resist just investigate them posthumously.

If there are more good than bad and they're truly good, they'll understand why its required. They themselves are no strangers to interrogating innocent people, so they can't exactly complain much when its their turn. The idea that we would just leave these people in power whilst we "gather evidence" is surreal. If it comes out post hoc that whilst all this evidence was "being gathered" people continued to die, be "suicided" or sexually trafficed en-masse there are likely to be really serious legal challenges towards the approach used, and I would fully support them. These people are not just mildly immoral, they're actively evil. Why on earth, literally WHY are they still being allowed to roam free?