When the dude bends over from that a knee to the face settles the issue.
Secure until police arrive.
He might get up and try to kill you or run, so while he’s on the ground holding his face from your knee, stomp with all your weight with one foot on his knee from the side.
Then he can’t stand or run.
When putting down a rabid animal, be safe!
Sometimes you gotta do what you gotta do. But given this happened in a woke, “progressive” city:
Sad possibly #1: A leftist DA might decide the citizens used too much force. So one or more of them get arrested.
Sad possibly #2: A personal injury lawsuit might decide the citizens used too much force. So one or more of them get sued.
Again, sometimes you gotta do what you gotta do.
But it sure isn’t Eisenhower’s America any more.