Super short catch up since I'm trying to read at super speed. I read half the thread yesterday and then never posted, I'm sorry about that, completely lost track of that.
Overall idea of get rid of the DEA agent, yes that is preferred, something that will need to be done, but is essentially impossible without some movement in the game.
First thoughts I had about finding out who is who outside of whatever abilities there might be is this game is going to come down to vote analysis in the extreme. Since the guards know who their leader is they will have a hesitation to vote for them. The leaders can use this to find their guards, and the DEA agent can use this to find the leaders. It still doesn't help us find the DEA agent except they will have no hesitations to vote for anyone at all. Something to consider going forward.