The Death of John Lennon Conspiracy Mystery

John Lennon was one of the greatest musicians of his generation. The peek of his celebrity was as a Beatle, but as a solo artist managed to create hits like "Imagine" that are still anthems today. His life was tragically cut short when a deranged fan shot him 4 times at close range outside his home in New York. But, what is that didn't actually happen? What if John Lennon was actually a member of British intelligence? What if John Lennon didn't die but was instead relocated and is living life under an assumed identity?