You wouldn't want to go on a double date with these killer couples. Welcome to WatchMojo, and today we're taking a closer look at 20 of the most infamous and terrifying serial killer couples in history. Our countdown of serial killer couples in history includes James Marlow & Cynthia Coffman, Paul Bernardo & Karla Homolka, Alton Coleman & Debra Brown, Ray & Faye Copeland, and more! read more...
20 Real-Life Serial Killer Couples
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VOICE OVER: Rebecca Brayton
