Robb Stark is dead. there is little doubt in that, we saw it happen at the Red Wedding. Later, we hear that his body was mutilated and his wolf's head sown atop his own. Unlike Cat's body, we never see this happen through a character, just hear of it. Besides that we don't get many details regarding grew winds death or what happens to Robb's corpse. Maybe they just tossed it into a shallow grave... maybe. or maybe the tales small folk tell have distorted the truth. Theirs a long ways b