D.J. Qualls was shooting Supernatural last Friday, when he was severely beaten by Vancouver police. Qualls witnessed a fight and when he tried to tell an officer what he saw he was attacked. He's okay, but he took to this twitter account to demand justice. You can read the complete article here.
You'll see Qualls in the SPN episode entitled "Time for a Wedding." He plays a laid back hunter named Garth who annoys Dean.