"interviews with Mr Bazata, who died in 1999, and extracts from his diaries, detailing how he staged the car crash by getting a troop truck to plough into Patton's Cadillac and then shot the general with a low-velocity projectile, which broke his neck while his fellow passengers escaped without a scratch."
Mr Bazata also suggested that when Patton began to recover from his injuries, US officials turned a blind eye as agents of the NKVD, the forerunner of the KGB, poisoned the general.
Mr Wilcox told The Sunday Telegraph that when he spoke to Mr Bazata: "He was struggling with himself, all these killings he had done. He confessed to me that he had caused the accident, that he was ordered to do so by Wild Bill Donovan.
"Donovan told him: 'We've got a terrible situation with this great patriot, he's out of control and we must save him from himself and from ruining everything the allies have done.' I believe Douglas Bazata. He's a sterling guy."
Mr Wilcox also tracked down and interviewed Stephen Skubik, an officer in the Counter-Intelligence Corps of the US Army, who said he learnt that Patton was on Stalin's death list. Skubik repeatedly alerted Donovan, who simply had him sent back to the US.
"You have two strong witnesses here," Mr Wilcox said. "The evidence is that the Russians finished the job."
The scenario sounds far fetched but Mr Wilcox has assembled a compelling case that US officials had something to hide. At least five documents relating to the car accident have been removed from US archives.
The driver of the truck was whisked away to London before he could be questioned and no autopsy was performed on Patton's body.
With the help of a Cadillac expert from Detroit, Mr Wilcox has proved that the car on display in the Patton museum at Fort Knox is not the one Patton was driving.
"That is a cover-up," Mr Wilcox said.
