No doubt by in my mind from the video/still he was “shot” - like small caliber weapon.
Now the cover up starts - gonna hear he wasn’t and the bleeding from his being pushed down. Sorry - no way you get that injury unless hit by a projectile of some sort.
Inexperienced shooter (or just unlucky one - or very lucky one depending on your politics) long range with a .22 (think over 400 yards).
Given the caliber - I’m gonna agree with 3D printed gun.
You know there’s gonna be “conspiracy theorist” saying CIA behind it. Sorry - if it was professional he wouldn’t have been standing following.