Any notion that this assassination attempt was staged is pure idiocy at best, and most likely deliberate misinformation.
No one would trust someone to be such an amazing shot as to be able to shoot a bullet so accurately that it only grazes your ear because such a shot is basically impossible to guarantee.
To put that into prospective, the best sniper rifles in the world can barely achieve sub MOA groups at 100m under ideal test conditions. 1 MOA at 100 yards is a 1 inch spread, which is the difference between a grazed ear and a canoe’d brainpan.
To do that shot with an AR15 is basically impossible unless you are talking about one of the specialist DMR semi-autos, which i seriously doubt this guy used.
The shooter fucker up with his weapon choice, but also got supremely unlikely as it looked like Trump just happened to have moved his head at the precise moment he pulled the trigger. Otherwise Trump would be dead or grievously injured and out of the presidential race.