Board Thread:Skyrim/@comment-11982931-20130923051752/@comment-7953253-20130925052505

You cannot prevent Susanna from being murdered. There's just the slight chance that her corpse with the guards and gawkers standing over it.

Although, if you listened to my other comment and NOT suddenly pin the muders on Wuunferth, you CAN prevent that Altmer woman's death. Who happens to be the 'Killer's' next victim. IF you followed the correct path, and talked to Wuunferth, and not acuse him to Ulfric's steward.