I honestly think the original plan was to have Rosemary as the murderer but since she has become a popular superbitch its unlikely they will get rid of her now. She is a great actress unlike the alleged superbitch before her *cough PK cough*. Jamie hope is a wast of space so they may blame him although Charlie Boy the Chief CONman is hardly a vital character so they may blame him.

I think the producers like the viewer have been pleasantly surprsed at how well Rosemary has fitted in.

Well that my theories