The assassination of US President John F Kennedy in 1963 is one notorious crimes in history.
Here, we look at what happened and who was accused of his killing.
Who killed JFK?
No one knows for sure who killed JFK but the official version is that the culprit was Lee Harvey Oswald.
The US President John Fitzgerald Kennedy was assassinated in Dallas in November 22 in 1963 as he travelled in a motorcade through Dealey Plaza.
Shortly after, Oswald, a 24-year-old self-proclaimed Marxist, was arrested in a nearby cinema after police hunted a killer of one of their fellow officers.
He denied shooting anybody, claiming to reporters that he was a “patsy”.
Later he was accused of shooting the President dead with his $21 mail-order rifle from a window of the sixth floor of a nearby school textbook warehouse.
Two days after the assassination and his arrest, Oswald was being escorted from Dallas Police Headquarters to county prison.
As he was taken out in front of the world’s media, a man called Jack Ruby stepped forward and shot him dead.
Ruby was later found guilty of murder and sentenced to death.
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He appealed but died of an illness in jail before his new trial could take place.
The Warren Commission in 1964 reported that Oswald had been the lone gunman, and another congressional probe in 1979 found no evidence to support the theory that the CIA had been involved.
But some say this was a cover-up.
Conspiracy theories include a CIA plot, a mafia hit job and a covert operation by the vice president Lyndon Johnson.
What are the assassination files?
For decades, the existence of secret government files linked to JFK’s assassination has helped fuel conspiracy theories that others besides Oswald were involved in his murder.
The government was required by Thursday, October 26, 2017, to release the final batch of files related to Kennedy’s assassination.
The collection includes more than 3,100 documents comprising hundreds of thousands of pages that have never been seen by the public.
About 30,000 documents were released previously with redactions.
The National Archives posted the files on its website.