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John Wayne Gacy victims' remains exhumed for DNA testing (VIDEO)

DNA testing may help identify them.

John Wayne Gacy victim ID'd using DNA technology (VIDEO)

William George Bundy was ID'd using DNA technology.

Supporters of the scheduled execution of serial killer John Wayne Gacy hold balloons and wear party hats as they march in a Gacy Day Parade May 9, 1994 in Chicago.

Eugene Garcia

AFP/Getty Images

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