In the confusion of the moment, I doubt anyone could accurately remember how many shots they heard - only that they heard a bunch. Is there news reel footage of this? Surely, someone has tried to determine the number of shots from the tape.
You can locate many articles challenging the official story of the RFK assassination by doing a bit of research on the internet.
Evidence found on the scene included photos taken by student Scott Enyart, which were seized then destroyed many years later when he asked for them to be returned.
Door jambs which reportedly had bullet holes in them were also destroyed by the LAPD.