Typically, a hardened target like that merits a hip/pelvic girdle shot to pin them in place.
Was reading recently that the dirtbag had a ballistic helmet and bulletproof leggings on as well.
You know, I’m not sure a CCW would have been able to do much at all. We’re down to a face shot to have a chance, and that’s some damned slim pickings.
Best option would have been someone tackling him.