Kudos to the 3 men who helped the officer!
The first guy on the scene was black, with a torn ACL no less! I admit sometimes we get swept up in the evil that is #blacklivesmatter and overlook that most blacks are decent, upstanding citizens who do the right thing (as are ALL citizens in the USA of all colors and tendencies).
I do note the perp was black and am willing to bet he was motivated by #blm (unproved as of this moment).
Food for thought.