Even if he did have civilian ballistic armor, the backface trauma from a solid torso hit on it -- even from a 9mm -- is an extremely painful and bruising shock (and may include broken ribs)...
Even with armor, a few rounds into his torso and/or whacking on his helmet would have distracted, slowed, and disabled him enough for folks to tackle and disarm him.
But he lacked armor; those same torso hits would have dropped him.
First we heard carrot top was wearing ballistic vest body armor, then we learn that it was a tactical assault gear vest, and now I learn that it was multi-pocketed photog vest. LoL.