Founding member of the Byrds and Crosby, Stills & Nash has died. David Crosby was a member of the Rock and Roll Hall of Fame and prominent figure in the counterculture of the 1960s. David received a liver transplant with the help of Phil Collins in 1994 attributed to a condition with hepatitis C. In 2014 David pushed back the closing dates of a solo tour to undergo other medical treatments. David Crosby passed at 81 years old after battling an extended illness.