Jane is going down a very dark path. There also appears to be some breadcrumbs to indicate that Cho and Van Pelt aren't faring much better. Van Pelt still isn't over her finacee's betrayal ("Men lie"), and Cho's back pain (and resultant pain killer use) looks like it might lead to something. I'm not sure why getting the FBI girl off of the Panzer case would get Red John to leave her alone. Seems to me he's got a taste for her now.