User blog comment:Sicknote45/The Elder Scrolls V: Dawnguard: Vampire Lord or Dawguard Defender/@comment-76.30.211.140-20120622030637/@comment-107.4.212.183-20120625051759

In the trailers an E3 vids the guy fires a crossbow from the back of the demon horse so I think either side can get him/her. I'm pretty sure you can't just kill folks and use their crossbow they said you need special training that you can only get from the DG.