But I don't think she was ever in the line of fire, so long as she didn't suddenly jump to her left. The old guy was very concentrated and had a good Weaver stance. And the robber's gun was pointed at him, even though the robber's attention was diverted.
Looks like a good shoot to me, and the DA seems to agree.
The slimeball's argument that he was down and therefore no threat is bogus. Plenty of people have been shot by a wounded felon returning fire. You keep on shooting until you're sure the threat is over.
Yep, I liked the way Williams did the fire-and-advance thing, several times. I wonder if there's some training in his past, beyond the usual CCW stuff.
As for the bystander, I was more concerned that she'd walk into a gunshot fired at Williams by the fleeing perp. She's lucky that the old fellow kept the heat on them hard, compelling the armed thug to retreat rather than shoot it out.