MTG-
As usual, in chaotic situations, there are eyewitnesses and other eyewitnesses.
However, three eyewitnesses place Sirhan close enough to RFK for the fatal shot, and Coroner Noguchi's estimates of the gunshot distance are only that, estimates.
Sirhan said that RFK turned suddenly away when he (Sirhan) put his gun towards RFK's face. So that explains the shot to the rear of RFK's head.
In addition, witnesses described all gun shot reports as the same in pitch and volume---in other words, all shots sounded as if they were the same, from Sirhan's .22 or an identical .22.
This tends to rule out the idea that RFK was shot from behind by security guard Eugene Thane Cesar, who was armed with a .38. BTW, Cesar's connections to the "Deep State" are non-existent.
That said, Larry Hancock and John Hunt did careful work (see Hunt's book), and concluded that more than eight shots were fired that night in the Ambassador.
It is risible Sirhan was hypnotized, although he may have been deranged, and put himself into a state or stupor.
Sirhan was a loveless, nearly penniless, diminutive, baleful anti-Semitic crackpot, who murdered RFK for the Senator's support of Israel, and said so many times.
I open to the idea Sirhan's brother, a Palestinian extremist who bought the .22 handgun for Sirhan, could have also fired some shots that night. There were many reports of someone who looked a lot like Sirhan at the Ambassador.
The LA DA wanted a prosecutable case, and went with the LN narrative.