If that is the shell casing being ejected (looks like an unfired round) then I would think that the bullet would have already hit the victims right eyeglass where they say he was shot. Doesn’t look like it.
Supposedly the city has video cams on the plaza. It will be interesting to see what they show.
Look again.
That is the spent cartridge being ejected. The photo shows the slide has been blown back exposing the barrel.