World's Most Evil Killers - Season 6, Episode 18 - Velma Barfield - Full Episode

She became the first woman to be executed by lethal injection after taking six lives. What drove her to commit these callous murders?

An in-depth look at the lives and crimes of some of the world's most evil killers. New episodes including Lee Ford, Pawel Relowicz, John Shaw, John Allen Muhammad, Derrick Todd Lee and more.

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