Mr. Death - The Rise and Fall of Fred A. Leuchter, Jr. - Errol Morris documentary

Depending on your point of view, Fred Leuchter is either:

A martyred champion of the truth

or

An astonishingly stupid, naive, and foolish man utterly unaware of the narrow limits of his own knowledge and ability.

Armed completely without training in engineering, human physiology, chemistry, or history, he nonetheless offered himself up first to American prisons as an expert in judicial execution methods and equipment, then to the Holocaust denial community as an expert on the Nazi gas chambers.

Errol Morris is the Oscar-winning director of "The Fog of War", "Fast, Cheap, and Out of Control", "A Brief History of Time", "The Thin Blue Line", and others.