Justifiable homicide is a fine line. In determining a justifiable homicide, a lot depends on your state law and the local DA.
Vehicular homicide is a criminal act and a different category reported yearly to the FBI.
Be a lot more informative if the reporters included this sort of info in their stories.
I realize DA can't often make a determination for specific incidence right away. Its happened a few times recently, but usually the story leaves it open its not followed up by the news people.
Its just annoying they focus on how big the number is, but dont ask what it includes or break it down in some way that might be more useful for comming up with personal and community responses.