Mark David Chapman in May 2012. NYS Dept. of Corrections/Reuters /Landov hide caption itoggle caption NYS Dept. of Corrections/Reuters /Landov The Two-Way No Parole For Mark David Chapman, John Lennon's Killer August 23, 2012 The man who murdered the Beatle in 1980 has now been denied parole seven times. He's serving a sentence of 20 years to life.