The fact that most people have never heard of these horrific serial killers is the real crime. For this list, we'll be looking at the most terrifying killers that haven't received widespread recognition. Our countdown includes The Harpe Brothers, Luis Garavito, Clementine Barnabet, Israel Keyes, and more! read more...
Top 20 Scariest Real Life Killers You've Never Heard Of
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VOICE OVER: Rebecca Brayton
