Keyvan...you are a terrible analyst. You should quit while you are behind.
An opinion would be like this...There are, as you claim [which is an opinion] two gunmen within the covered pergola. One has a rifle and the other must be standing upon his shoulders with a rifle which they fire at the limo. They escape down a scuttle hole in that pergola corner which they had dug previously and disguised with a fake concrete lid and tunneled then to a sewer pipe. ---That sir is an opinion and as and silly as it might seem, this is what you seem to propose.
Jerry, you are starting a theory all by yourself. Look at the evidence. It is there. Two shots seen by the Nix Film from the pergola that is undeniable except by those who refuse to see it.
The evidence is evidence, the fact is fact. I showed you the evidence and the facts without an interpretation. If you choose not to see it, that's on you.