Singer and Hollywood movie-star Elvis was found dead in his Georgia home on at the age of 42, on August 6, 1977.
But mysteries have surrounded his death ever since – such as his autopsy not being released to the public until 2027.
Medical examiner Doctor Jerry Francisco even listed Elvis’ cause of death as an irregular heartbeat – a condition which can only be diagnosed while a person is still alive.
It has led conspiracy theorists to believe the King of Rock may, in fact, still be with us.
One huge “clue” that has re-emerged ahead of what would have been his 84th birthday on Tuesday is a mysterious tape of someone who sounds eerily like Elvis speaking – which was taken in 1981.
It was sent to American author Gail Brewer-Giorgio, who was shocked to discover the man discussing the struggles of his new life, including growing a beard in order to conceal his identity.
She took the tapes to voice recognition expert L.H. Williams, who claimed: “The known voice of Elvis Presley compared with the voice on this tape is the same.”
Gail had been sent the tape after she released a book titled Orion in 1977 – the same year Elvis died.
The fictional book told the tale of the title character – loosely based on the singer – who faked his death in order to escape the growing pressures of fame.
But as talks of an Orion movie began to take shape, the book mysteriously vanished from shelves and all hype in relation to the story dropped off the face of the Earth.
Some even believed Gail was shut down for being too close to the truth about Elvis.
This spurred the author to find out what really happened to the King in hopes of clearing the reputation of her novel.
Gail eventually published the recording alongside a book chronicling the findings in 1988.
But it wasn’t the only piece of evidence she used as “evidence” of the iconic star’s “fake” death.
She noted a mysterious spelling error on his tombstone could imply he was never actually buried.