Farkas from the companions (and other members from what ive read) chases me around and keeps talking to me, can't fast-travel away because he counts as a guard persuing. IJt's pretty much game breaking as i can't do anything because he just follows me.
I've tried turning off Combat AI, which didn't work. turning off NPC AI and turning it back on does nothing. i've tried getting imprisioned, but that didn't fix it, you can't kill him either.