Feeling fairly disturbed since yesterday because I saw that smirk again (not in real life).
Since if you lurk around the autism community long enough, you know how much someone actually socializes by their eyes. If you lurk around the abuse support groups long enough, you know the smirk informs sadistic quality in a person.
It often happens when they project their own disavowed qualities (cheating, exploiting, hating) to the victims and feel their attacks and humiliating justified. Normally what they accuse others of doing is exactly what they already did and might currently be doing still.