David Wilkerson - Wikipedia

David Ray Wilkerson (May 19, 1931 – April 27, 2011) was an American Christian evangelist, best known for his book The Cross and the Switchblade.He was the founder of the addiction recovery program Teen Challenge, and founding pastor of the non-denominational Times Square Church in New York City.. Wilkerson's widely distributed sermons, such as "A Call to Anguish", are known for being direct