Wanna bet? Buffy will simply say, "That wasn't REALLY Angel. It was nasty ol' Twilight who did the neck breaking thing with Giles. My sweet darling Angel would no more do a thing like that than he would kill a couple of thousand Slayers, plus god only knows how many soldiers and civilians, and put the entire world on jeopardy. I just KNOW that he wouldn't!" and the "Angel Gets Out Of Jail Free" card will be invoked one more time.
(But don't think that I'm just singling out Ol' Broody. Okay, maybe I am, just a little, but it's gotten to the point that NOBODY in the Buffyverse has to pay for their past crimes. Buffy tried to kill them all; Angel/Angelus tried to kill everybody AND bring about Acathla; Giles murdered Ben; Xander invoked a dancing demon who killed several people and almost killed Buffy; Willow murdered Warren; Spike killed all those people and buried them in the basement; and let's not forget Andrew shoving a knife in Jonathan's innards. We've got a whole cast of murderers here, folks. The only one who's in any way owned up to and accepted punishment for her crimes is Faith, ane they call HER the Rogue Slayer. Go figure...)