I was on the miscellaneous quest to kill the dragon up for bounty in Riften, fighting a dragon, when all of a sudden I started to get attacked by a witch, some random soldier NPCs, and a spriggen, all at once. I eventually managed to dispatch the dragon and most of the attackers, but there was a single soldier NPC who must clearly be essential because he absolutely would not die, even though he continued to attack. He would go down once all of his health was out like the followers do, then get back up and continue to attack. Does anyone have any idea what's going on here? Who the heck is this guy?