As I’ve said, each officer is responsible only for his own bullets, not for the other officers’ decisions on scene. So they will have to answer and account for their actions and rounds fired. It’s very possible one or more of them were excessive. But the more important thing they’ll be judged on is whether they were justified to shoot in the first place.
Yes sure he reacted. Reacted in the most wrong, bizarre and dangerous way you can imagine. And continued to “react “ badly which resulted in him getting shot to death. He may have been going through a mental health episode, that may be his excuse. But his multiple continued unlawful actions are not excusable.