In order for this shooting to be staged, one would need a willing subject and a sub-MOA rifle. Meaning a rifle that would shoot under 1 inch groups at that distance (I am being generous, as the true definition would in this case be 1" [3 shot] group at 100 Yards/Meters).

No sane person would allow a person with a rifle to shoot at their head. With that said, if you could find people willing to have you shoot at their head, none of them would allow someone to do so with a 2-3MOA rifle. Not if they like breathing.