[Susan leans against her podium, looking down into the pit, obviously thinking aloud.]

If Sigrun were capable of coming to the foyer when Jericho made his announcement, I believe she would have. Even if she were with Kimblee, she would have cared enough about one of us maybe getting punished again. So...yeah, maybe she'd already been drugged by then? He wouldn't have had to cut her already, he could have gone back after Tabby died. Maybe he left her there to die from the overdose, and then decided to speed things up?