Pepper spray was used, there are photos, but what I’ve read, supposedly, the perp saw the can and brandished his weapon, the victim responded with the spray, and the perp fired.
Some have said that the shot came from flinching from the pepper spray, but others said that since it was a head shot, and not a wild shot, it was deliberate.
That sounds like self-defense to me.
I wouldn’t want to be disabled by bear spray, especially close to hostile protestors.