Dolloff, having reached for Keltner's weapon (or the spray) WAS INSTIGATING.
Keltner slapping away Dolloff's reach WAS self defense.
In fact the video shows that Keltner deployed the spray IN RESPONSE TO Dolloff drawing his weapon.
The video also shows Dolloff reaching for his weapon as Keltner is slapping him away.
Dolloff is guilty of Second Degree Murder.
After various court delays the charge will be plea-bargained down to littering and creating a nuisance, and Dolloff will be sentenced to go sit for an hour on the Group W bench.