Yep, her family will sue and he will be out on the street at 80 years old which will basically be a death sentence for him. Too many examples of people screwing themselves after they defend themselves. Probably the worst example being Bernard Goetz in New York city who turned himself in and opened his mouth when it was very unlikely he would have been caught. He ended up owing $43 MILLION to one of his muggers.
If the statements in the article check out, this was not actually self-defense.
You can't chase down someone and kill them outside your home.
You can't shoot an unarmed person who is begging for her life.