deadly force may be used if your attacked with a weapon. Yes being struck with a skateboard is capable of causing serious injuries and or deathOkay, genius.
The jury has to ask themselves a few questions. First whether being wacked by a skateboard is a significant enough threat to kill your assailant?..... Then whether the Skateboard Guy had any conversation w KR along the lines of "Dude, you killed that guy back there. Don't run away, dude. You need to go to the cops right now."
Because if so, then SD was arguably not a threat of serious injury or death.
Thirdly if KR killed Rosenbaum, whether SD has the legal right to make a citizen's arrest of KR and whether KR fleeing entitled SD to use force to subdue KR?
All these are serious trial issues. KR may be successful on all of them, but we don't know yet. Right now, you're being like the class clown in math class who flicks his boogers at the other clowns instead of paying attention. You may think it's smart, but it's just stupid.
As I’ve said before if he is found innocent on the first shooting the second and third will be self-defense as he was being pursued and was attacked by people carrying weapons ( skateboard and a pistol)