Jack Ruby’s Final Jailhouse Interview Solves Long-Buried Mystery Behind JFK Assassination

Notorious mobster Jack Ruby made history by gunning down JFK assassin Lee Harvey Oswald, but sources newly reveal that he also played a key role in the killing of the president in Dallas on Nov. 22, 1963 — and that both men were silenced for what they knew.

A new book unveils how the Dallas-based enforcer was tasked by the Mafia to silence Oswald and bury his part in the conspiracy to kill John F. Kennedy — only to suffer the same fate himself.

Ruby died behind bars in 1967 while awaiting a new trial for shooting Oswald two days after the shocking assassination — his earlier conviction and death sentence had been overturned on technicalities. While in prison he gave a damning interview where he confessed: “The same people who want me to get the electric chair are [the] ones who wanted President Kennedy killed,” according to former Gambino crime family member Louis Ferrante.

As the world knows, then-FBI Director J. Edgar Hoover and the Warren Commission — which turned down Ruby’s offer to spill his guts on the JFK assassination eight times — ruled that Oswald was a deranged lunatic who acted alone.

But Ferrante insists in his book Borgata: Clash of Titans — about the mob’s inner workings — that both Ruby and Oswald were informants for the FBI, and that the mob tasked Ruby with shutting the gunman’s mouth to cover up the conspiracy.

“Then they took Ruby out to tie up loose ends,” a source exclusively tells Globe.

As readers know, Hoover conspired with the Mafia to kill Kennedy — who threatened to remove him as the all-powerful FBI director — for green-lighting JFK’s Attorney General brother Robert F. Kennedy’s relentless crusade against organized crime.

Chicago-born Ruby was well-connected in Dallas in 1963, running local strip joints and reporting directly to powerful Don Carlos Marcello of New Orleans, who is believed to have ordered the hit on JFK.

Shockingly, Ruby was seen in Dallas’ Dealey Square the morning of the assassination by a 23-year-old housewife who swears she saw a man remove a rifle in a long paper bag from his car.

“That was damning information that went absolutely nowhere in the subsequent investigation,” a source tells Globe.

Then, sources say, after the president’s brains were blown out and Oswald was arrested, Ruby seemed to panic and curiously drove to the police precinct where the supposed shooter was held.

“He was known to the cops and was able to saunter right in and hang around the station — without any official purpose for being there,” a source tells us.

Ferrante writes that an agitated Ruby panicked because he couldn’t find the right moment to get to Oswald, but that later that night, he went back to the station house with his gun and again failed to find an opening to fire on his target. It wasn’t until the following day, Nov. 24, that a determined Ruby returned and got his shot — mortally wounding Oswald and silencing him forever.

Ruby was charged with murder and faced execution, but after he was menacingly visited in jail by Texas mob underboss Joe Campisi, he pleaded with Earl Warren and his commission to take him to Washington, D.C., saying, “I want to tell you the truth and I can’t tell it here … I have been used for a purpose.”

Several of the strippers who worked for Ruby were reportedly paid for their silence — while others met worse ends.

“One of his strippers was killed to put an end to the speculation that she was going to testify about Ruby’s role in the assassination,” says a source, referring to the February 1964 death of Betty Mooney MacDonald.

She was arrested for fighting with her roommate, and an hour later, she was found hanging in her cell.

Another, Rose Cherami, was killed in a hit-and-run in September 1965.

Our source says Ruby was poisoned in prison, leading to his convenient death on Jan. 3, 1967.

“The Kennedy family always believed that he was somehow given some drug that caused cancer and that’s how they finally quieted him,” our source insists.