She showed deadly intent.
And virginia does not have a 'castle law' but we have a very long and strong set of common (case) law that is almost as good.
No duty to retreat in any place you are legally allowed to be (including public places).
'Reasonable man' fear of death or grave injury.
A well defined set of rulings defining excusable and justifiable homicide.
The state legislature has turned down attempts to pass a statutory castle law since it would open the door for all sorts of mischief with the existing case law.