If the fight was “tequila-infused,” then people can be and are charged with murder for accidents. It is called vehicular homicide if you accidentally kill someone while driving drunk.
This was mentioned later in the article:
While Ouchlaeun may have been drunk when she drove over her boyfriend in the small driveway, the judge ruled in favor of public defender Christy Craig’s argument. Craig asserted the prosecution didn’t have grounds to charge Ouchlaeun with DUI because she didn’t make it on to the public street.
If a man hits a woman and then gets run over while trying to prevent her escape, it’s not homicide, it’s self-defense.