A secret service agent who was metres away from John F Kennedy when he was assassinated in 1963 has made a shocking revelation that calls into question whether the gunman acted alone.
In a soon-to-be-released book, Kennedy's ex-secret service agent Paul Landis claims he picked up and moved a bullet from the Kennedys' car and it's a secret he's kept for 60 years.
Kennedy was shot in Texas by Lee Harvey Oswald who was then himself assassinated two days later.
Neither of the men are here to set the story straight. However, Landis said he wants to after years of trying to block that day out.
"I just had a newsreel going through my head that was just repeating, it was just like a looped tape of the President's head exploding," he said. "I could not shake it".
He's had a major revelation to share and it's one he's kept a secret up until now.
Moments after JFK was shot, the secret service agent said he picked up a bullet from the back of the President's car and carried it to what he thought was his hospital stretcher.
"This is the place to leave the bullet, it will be found during the autopsy and that will help them resolve what happened."
Except the stretcher ended up carrying the other injured passenger from the vehicle, Texas Governor John Connally, which led authorities to believe the bullet had dislodged from his body.
However, Landis' revelation changes all that.
"I think it is the most important evidence in 60 years, nothing like this has come out that is so different from the standard narrative," historian Jim Robenhalt said.
The "standard narrative" supported by the US government's Warren Commission inquiry has always had sceptics, proposing that as well as the fatal bullet that hit JFK's head, a second bullet hit him in the back, travelled through his neck and out his front, straight into the body of Connally, ricocheting into his arm and then his leg. The theory largely decided because of that bullet found on Connally's stretcher, it was dubbed the "magic bullet". The seemingly impossible pathway was even demonstrated in the film JFK and it was that theory that was used to help establish Oswald had acted alone.
But Landis said the bullet didn't travel very deeply into JFK's back before popping out behind him in the car, where Landis found it - and that's encouraged people who believe one bullet hit the President in the head, in the back and another which hit Connally.
However, one gunman couldn't have fired all three that quickly.
"It was lying on the seat right there," Landis said, pointing to a photo of the back of the seat.
Landis is now 88 years old and while many people will query why he never mentioned all this earlier, it suggests the "magic bullet" perhaps wasn't magic after all.