Huck Kills Sue!
Soon after Olivia handles the Sue (guest star Lena Dunham) situation and convinces her to keep quiet about her book, Huck shocks Quinn and murders Sue right in front of her. Huck explains that Sue would have talked eventually. That would jeopardize his chance for immunity with David Rosen. Watch this scene from Scandal Season 4, Episode 16: It?s Good to Be Kink.