It was Dec. 8, 1980, when the world-famous musician was with his wife, Yoko Ono, and was shot by Mark David Chapman outside the Dakota apartments on Manhattan’s Upper West Side.

Mark David Chapman is serving a sentence of 20 years to life over the 1980 killing.

(This story is part of The Associated Press series AP Was There.) The death of John Lennon still reverberates as a defining moment for a generation and for the music world. A man who helped define rock and roll, a leader of the peace movement, an icon of the Baby Boom generation, his sudden shooting...