The government's efforts to suppress the growing movement led to the imprisonment of Steve Biko, who became a symbol of the struggle. Biko died in police custody on 12 September 1977. Steve Biko was a non-violent activist, even though the movement he helped start eventually took up violent resistance. White newspaper editor Donald Woods supported the movement and Biko, whom he had befriended, by leaving South Africa and exposing the truth behind Biko's death at the hands of police by publishing the book "Biko".