Oh lay off it, Susan. She wasn't in the right for thinking to kill, but she was paranoid. Being put on deadweight is practically a death sentence at this point: most of those who died at this point have either been on that or the dispensable list.

And she did make a good point: you've been consistently getting immunity for one reason or another. It isn't proof that you're behind what's happening, but it is odd. She probably suspected Stiles for similar reasons.