Breacher
Next of course is when the winds of political change put another group of people in power who know the truth and decide not to sanction what their predecessors have done. That is the circumstance where I can see the spy chiefs just quitting the game, taking their retirement and walking away.
What happens depends on who the the New Group of People in Power are.
I know if I was in Power I would not let the People responsible for Murdering Patriots and other Citizens just Retire and Walk Away.