Proof of Life

Proof of Life is a 2000 American action thriller film directed and produced by Taylor Hackford. The title refers to a phrase commonly used to indicate proof that a kidnap victim is still alive. The film's screenplay was written by Tony Gilroy, who also was an executive producer, and was inspired by William Prochnau's Vanity Fair magazine article "Adventures in the Ransom Trade", and Thomas Hargrove's book Long March to Freedom, in which Hargrove recounts how his release was negotiated by Thomas Clayton, who went on to be the founder of kidnap-for-ransom consultancy Clayton Consultants, Inc.