While assigned to the FBI organized crime undercover operation Mettler learned from associates and informants that assassination was a core tactic of certain covert operators of the Central Intelligence Agency (CIA). Mafia hit men were recruited and paid to assassinate Fidel Castro and later the Kennedy brothers. Their father Joe Kennedy's relationship with Mafia pals Giancana and Costello went back to Prohibition days when he was a prominent bootlegger. Giancana and Costello helped raise campaign funds for John's election. The Kennedy brothers became a threat to the power brokers and a target for assassination when Bobby, as Attorney General, vowed to destroy the mob and John pledged to disband the CIA and bring all combat troops home from Vietnam after his reelection.

Mettler says the book is not an academic history, it's based on first-hand life experience, recovered memory and later assiduous research.

He says that according to his research and investigative experience the Kennedy assassin was not Lee Harvey Oswald or a handful of exile fanatics, Mafiosi, or a gang or right-wing Super Patriots operating on their own. John Kennedy was a threat to all the power brokers, corporate and government, the warmongers, the briefcase gangsters and their easy-money cronies. John and Bobby Kennedy were zeroing in and they were all scared to death.

An undercover friend in another department told Mettler about an elite one-world government community called the “Counsel on Foreign Relations” (CFR) that formed after World War I. They planned for future wars in the furtherance of international trade. To this day they disagree with President Dwight Eisenhower's warning in his presidential farewell speech to get control of America's Military Industrial complex to prevent it from becoming a major contributor to the economy. The membership in the U.S. Branch of the CFR consists of the most powerful and distinguished families in finance, commerce, communications, academia, covert intelligence operations, government and some presidents. Like the Mafia, the organization is super-secret and few American citizens are aware of its existence.

Mettler says the Warren Commission, President Johnson, the Secret Service, Hoover and the FBI lied about Kennedy's assassination including evidence that there were previous assassination plans to kill him in Chicago and Tampa. The designated patsies for the Chicago and Tampa plots were in Dallas when Kennedy was assassinated.

Mettler became disillusioned with the FBI and left several months before Kennedy's assassination. He said he couldn't trust anyone inside the bureau anymore. He later became a practicing attorney of civil and criminal law, co-owned two newspapers and served as a financial advisor in America and abroad. He is the author of seven best selling novels and a text book on criminal investigation.

Mettler's late wife, Darlene, asked him to write his story on her deathbed in 2008. He says he now has a clear heart and conscience for he has kept his promise to her.