I read about what happened (I have a problem with spoilers) and I still think my theory holds.
***spoilers***
I think the reporter chick is the Emma's mother's adopted baby (she said earlier that her dad was murdered before she was born), I think she found out what happened and is getting revenge. I think it will be similar to the scream movie where there's two killers and they both injure themselves to make them appear innocent. Jake's stabbing was too weird to me. I don't know what his connection is to the whole thing but that just seemed to give it away to me.
***end spoilers***
***spoilers***
I think the reporter chick is the Emma's mother's adopted baby (she said earlier that her dad was murdered before she was born), I think she found out what happened and is getting revenge. I think it will be similar to the scream movie where there's two killers and they both injure themselves to make them appear innocent. Jake's stabbing was too weird to me. I don't know what his connection is to the whole thing but that just seemed to give it away to me.
***end spoilers***