My prediction: Crawford is an enemy of the Grays. Not sure I want to be more specific. Maybe he doesn't know who he is.
I know you said you didn't want to be more specific but by 'Grays' do you mean aliens?
You know...with X-Files' Smoking Man, there is a sort of sympathetic quality to him...even though he's involved in sinister plots, the viewer gets the sense that it is for a greater good. There is one episode in particular that comes to mind, it was Christmas and the Smoking Man was attempting to write a novel and they portrayed him in this sort of lonely state, that focused a bit on his own personal sacrifices.
But with this Crawford character, after marrying his wife to advance his position and then murdering her after he drove her essentially crazy...there is no sense of greater good...for him, it's not even about the Cold War, it's all for power and job security and the viewer will never forgive him or sympathize with him...he's just all evil, no redeeming qualities.
Best Regards,