Is circleX the sign of the Hunters?
The guy who terrorizes Gareth's family in the boxcar is the crazy guy that gets released from the trailer and screams "we are all the same" then gets taken out by a walker. He was the last of the group that took over Terminus temporarily. According to this article his group has an interesting back story. He also appears to have an X in a circle tattooed on his forehead. Could he have been one the Hunters? Could the circle X be their sign? Could they still be around? Could the remaining Termites join Rick and Co. to fight them? The article seems to imply that we will find out more about that group.