Director Rob Reiner claims he's unearthed PROOF that JFK was killed by FOUR shooters not one - and says the reason the first shot missed president's motorcade is KEY to theory

Actor and film director Rob Reiner has claimed there were four shooters involved in the murder of President John F Kennedy and insists the reason the first bullet missed is key to his theory. 

Kennedy was shot as his open-top motorcade rolled through Dallas, Texas, on November 22, 1963 and he was pronounced dead after arriving at the Parkland Memorial Hospital. 

Official investigations concluded that he was assassinated by lone gunman Lee Harvey Oswald from a sixth floor window of the Texas School Book Depository. 

But Reiner claims there were more people involved in the fatal shooting of Kennedy who he names in his 10-episode podcast titled 'Who Killed JFK?' recorded with journalist Soledad O’Brien. 

He questioned reports that Oswald was solely responsible for the murder and believes the pair have finally solved the puzzle.

Reiner developed a fascination with the murder of Kennedy ever since he heard the news in high school, aged 16. 

Some believe a single bullet passed through Kennedy's neck before striking Texas Governor John Connelly who was sat in the front seat of the car. 

But there have been question marks of the legitimacy of the 'single-bullet theory'. 

Dallas resident Abraham Zapruder captured the moment Kennedy was shot on a silent 8mm color film but this was not widely available until March 1975. 

'You watch the Zapruder film over and over again,' Reiner told the Sun Sentinel newspaper. 

'And then when you watch that, it really becomes clear. No way that a bullet comes through Kennedy and then stops for a little while and it waits to hit Connelly. 

'None of it makes sense. And Connelly himself said too until the day he died, "The bullet that hit Kennedy didn’t hit me."' 

Reiner believes he has worked out exactly what happened in the shooting with the help of O'Brien and author Dick Russell. 

'I’m very confident on the conspiracy part of it,' he said. 'That, I’m 100% confident on. Exactly who did what, we make our best guess based on all the information we have.

'We name the shooters. We name the positions the shooters were in. Some people say there were four, others say five, and I’m still wrestling with that. But based on the forensics, we know there were four.'

But he is yet to reveal the name of the shooters until the final episodes of the podcast and added there are more revelations to come. 

'We say in the podcast for sure there was somebody up on the sixth floor,' the actor added. 'And there were people, there was somebody, firing from the sixth floor.

'I’m gonna ask you this question: Why did the first shot miss?

'That’s a key to what our theory is. That’s all I’m going to tell you. But the first shot missed. It missed the motorcade altogether.' 

Reiner decided to start the podcast looking into Kennedy's murder after he and his wife Michelle started listening to more podcasts. 

'There were lots that we were drawn to and one was a podcast that Soledad O’Brien did called ‘Murder on the Towpath,' he said. 

'So I started thinking, well, maybe a podcast is the best way to handle it.

'It’s something that I’ve been tracking for 60 years, everything something new turns up. 

'And what I wanted to do was try to find a way to put it all in one place, because when new revelations come out, people hear it, the press hears it, and they all go, "Oh!" But they don’t put it in context with everything.

'It’s like a little piece of the puzzle that comes out, and if you’re not following it intimately you won’t know what that puzzle looked like.' 

So far three episodes of the podcast have been released by iHeartPodcasts and they air every Wednesday. 

Reiner has directed films including When Harry Met Sally, A Few Good Men and The Story of Us.