Google Thane Eugene Cesar for the name and accounts of the actions of RFK’s security guard.
Also look into the coroner’s report, where Thomas Noguchi places Sirhan continually in front of RFK and unable to deliver the fatal bullet which was shot from behind.
The more important questions concern how Sirhan happened to get to a position where he could shoot RFK. Sirhan was not a criminal genius, so if you focus on who helped him to be in the right place at the right time then you are in a better position to conclude that he couldn’t have been acting alone.
Not to mention the 9-13 bullets that were fired and the six separate people who were shot.
“how Sirhan happened to get to a position where he could shoot RFK”
He looked like a busboy to the Kennedy’s.