He's dead. Get over it.
John Kennedy is dead. He was not shot by a conspiracy of Castro, the Mob, the CIA, and the aliens from Mars. He was most likely, in my opinion, shot once by Oswald intentionally and once by a Secret Service agent, unintentionally.
The first shot by Oswald was sighted with his scope, which was out of alignment. It hit the curb, fragmented, and peppered both the crowd and the President. Realizing he missed, Oswald worked the bolt and took aim with the iron sights on his Mannlicher Carcano.
At this point, the Secret Service, following Kennedy in the car behind, goes into action. One agent reaches down and grabs his new AR-15 rifle, chambered in the .223 Remington cartridge. Its new, its black, its deadly as hell. He thumbs the safety off and starts scanning the crowd for the shooter.
Oswald’s second shot caused seven wounds in two men. It went into Kennedy’s spine, out his neck, into Governor Connoly’s back, out his chest, through his wrist, and lodged in his thigh. At this point, Oswald stops shooting. The driver, realizing hell has opened up in his back seat, floors the accelerator.
The Secret Service car does the same.
The agent with the AR-15 loses his balance and a round is fired as he falls back. This round hits Kennedy in the back of the head and causes the massive head wound. At this point, its all over but the dying. And the fruitless speculation.
So how did they find three brass cartridges in the “sniper” nest? Easy. Oswald didn’t care for his rifle after the previous firing. He did not empty the chamber, clean it, or resight it. This would account for not only the missed first shot but also the third brass cartridge.
How did the second bullet zig zag to hit two men? It didn’t. The governor was not directly in front of the President, he was sitting closer to the center of the car, and from Oswald’s perspective the two were aligned.
How did the bullet stay pristine? It didn’t. Even a cursory examination shows both rifle grooves and noncircular deformation. It was able to cause the seven wounds because it was a solid bullet, not copper jacketed. It was designed to go through animals and keep going, or stop in larger animals. That it passed through two men and didn’t mushroom is no surprise.
Where in the world did I come up with such a wild, harebrained explanation? This book. It’s called Mortal Error and it examines only the ballistic evidence recovered from the crime. It disregards all the conspiracy theories, the multiple shooters, the echoes and all the rest. Most of it would not be admissible in a court of law anyway. Believe it or not, that is up to you. But it offers the most plausible explanation for the evidence shown on the infamous Zapruder film. That’s the story and I’m stickin’ to it. Now, can we please close the book on Camelot?