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VOICE OVER: Rebecca Brayton Enter the shadowy realm of forgotten evil... Join us as we explore some of the most disturbing murderers who've escaped widespread notoriety. From cannibals to child killers, these real-life monsters prove that history's darkest chapters often remain hidden. Which of these chilling criminals sends the biggest shiver down your spine? Our countdown features Gary Heidnik's underground prison pit, Charles Cullen's hospital murders, Alexander Pichushkin's chessboard killings, Samuel Little's record-breaking murder spree, and the unimaginable crimes of Karl Denke—history's forgotten cannibal. These are the murderers who somehow slipped from mainstream infamy. read more...