David Wilkerson was an American Christian evangelist, best known for his work among the young gang members and drug addicts in New York City in the 1950s. He founded Teen Challenge, a ministry that helps troubled youth find hope and transformation through faith. Wilkerson's influential book "The Cross and the Switchblade" chronicled his experiences, leading to its adaptation into a movie. His unwavering dedication to helping those on the fringes of society left a lasting impact and continues to inspire others to this day. Wilkerson's fearless spirit and compassion have made him a true icon in the world of Christian ministry.