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Note the subtle flashes hidden in the tree coming from up the path. There are two and they happen right around the time he was shot. Muzzle flashes?

look at the passenger next to the driver, this is fishy stuff - guess this is the reason why she is trying to escape out of the car heading backwards?

Good observation! That is JFK's wife. She seems to be trying to escape but it is very hard to tell her intention.

This case is and has been a riddle for the most of us, and for the ones who like to dig a bit deeper into things - the Swedish prime minister, Olof Palme, was executed for the same reasons as JFK I guess? It is not a popular thing having ambitions to democratize the economy.