@NekoShiro
If I go to a protest in England and carry a glass bottle around and someone else has a glass bottle and threatens to kill me with it so I smash the bottle over their head killing them instantly, proceed to be chased by people who are angry that I just killed someone Infront of them one hits me with a skateboard and tries to get the weapon off of me. It's perfectly okay for me to use the broken bottle to stab him to death and another person but he lives all in the name of self defense? Would I be cleared of murder in the UK?
You'd be allowed to defend yourself, so enough to make yourself safe. The problem is a gun only takes one shot. Repeatedly stabbing someone would be a different thing.
Moreover, I saw nothing from the video to suggest that the people who attacked him, saw what happened previously. Only that another man was following him shouting 'he shot someone' as KR was walking up the street looking for the police.
He wasn't aiming his gun at anyone, nor shooting anyone else.
The others were shot when they attacked.