I've got a player who is an experienced player that everyone looks to for game info including the GM. We are basically a learning group running Carrion Crown adventure. Everything was running fine up until all of a sudden the experienced player (playing a witch) kills the NPC and pretty much derails the entire module all together, as a GM this player was advised his actions is causing campaign problems but for whatever reason continued on path of destruction and literally argued his Witch doesn't know any better. At this point I've scrapped the module and trying my hand at home-brewing on the fly since everything is now FUBAR. Any advice on how to handle this type of situation is greatly appreciated. At this point I'm working on a Witch Hunter who will eventually hunt down the entire party now that they have gone bad. Their reputation has taken a turn for the worst and bounty's have been placed on their head's. I really do plan on killing the Witch and or bringing him in so justice can be served. Looking for a rock solid Witch Hunter build of some sort and anything else..
Thanks in advance.