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The Six Most Terrifying Serial Killer Families In History

Couples who kill together — Fred and Rosemary West, Karla Homolka and Paul Bernardo, David and Catherine Birnie — get plenty of ink. But what about siblings and larger family groups whose shared viciousness leads them into committing horrifying crimes? Read on for six especially nasty examples. » 5/18/15 5:35pm 5/18/15 5:35pm