Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-74.196.206.251-20130817054539/@comment-74.196.206.251-20130817150512

Just thought of a theory from what you said. No it doesn't explain how she was poisoned..

This is just a theory... And maybe I'm wrong.. but what if Peter poisoned her?

Then he knew Derek would do anything to save his sister and that meant giving up his alpha powers. Because we all know Peter has been acting... a little suspicious lately.