Mark David Chapman was a member of a YMCA group in Fort Chaffee, Ark., in 1975. Chapman was convicted of shooting former Beatle John Lennon in New York on Dec. 8, 1980. A quarter century after Lennon's death, a clearer picture has emerged of the mentally disturbed killer, though some would prefer that Chapman's name be omitted from Lennon's legacy.
Author: CBS News Staff
Credit: AP Photo