When you say unarmed men, surely you don't intend to omit the fact that they ambushed him and were chasing him and attempting to grievously assault him while he was trying to get away?
This omission game goes both ways. You're leaving pertinent information out to support your narrative also.
He had already committed murder at this point. It's not unusual (though it is unwise) to attempt to prevent a murderer from running away. Furthermore, saying that anyone was "attempting to grievously assault him" is speculation, since he shot and killed the first person to reach him after he tripped, and then shot the next person who was trying to disarm him.
3 men ganged up on him and took him to the ground, one attempted to crack his skull open with a skateboard. If "attempting grievous bodily harm" is speculative to you you either haven't seen the video of the incident, you're emotionally invested in your position on this beyond reason or you're agitating.
This omission game goes both ways. You're leaving pertinent information out to support your narrative also.