@thendrix Maybe the government isn't the best employer. She might have seen things that made her change her mind. That job title sounds like it would have been dealing with the inhumanity of man and the indifference of the government.
There's no real way to spot government deep cover agents. They are damn good at what they do to get those assignments. It makes me think of Hitman but without defining characteristics, level of fitness, proficiency with weapons or even their beliefs. They also only have one way to get out alive and that's to complete their objective. I doubt there's any way to trace them back. That's just a guess.