I'm not going to pretend to know what the situation is there. It sounds like you're more in tune than I am.
Ultimately it comes down to equal justice. There are people that scream from the rooftops when a police officers steps out of line, or shoots an unarmed person. I've contended that those can be high adrenaline situations. We have the same thing happen here and it's considered to be okay by some? We also don't like it when the previous criminal history is pointed out when an unarmed person is gunned down. But, now we want to point out that Hood had previous convictions. As if that justifies it's now.
I just watched the video. The perp was 54 years old and on the ground. He was no longer fleeing. The interview with LE said that the mob was beating him at the time police arrived. The actions of the father could be considered a high adrenaline situation. But, you can't excuse the actions of the mob for the same.