Virginia doesn't recognize common law marriages. The incident occurred in Delaware, I know nothing of their cohabitation laws.
Your comments on domestic violence I believe to be accurate. I will, however, offer this isn't a case of domestic violence. It's a case of trespass and assault.
NASCAR, the federally subsidized automobile manufacturer, SHR, et al, would have a greater degree of respect from me, and I dare say many others, if they grew a pair, pointed out the man has not been convicted of a criminal offense by a competent court of law and he will continue to participate in the series until such conviction.