Henry Wallace admitted to killing 10 women from 1990 to 1994. Friday's 20/20 features never-before-broadcast video of Wallace reflecting on the series of murders. "Lock The Door Behind You" premieres Friday at 9/8c on ABC. Stream on Hulu. https://abcn.ws/3PfhbeL | ABC 20/20

HISTORY TERROR – EL AS3SINO QUE TOCABA LA PUERTA: EL CASO HENRY LOUIS WALLACE History Terror presenta uno de los capítulos más perturbadores de la historia criminal en Estados Unidos. Durante años, Charlotte vivió con una falsa sensación de seguridad. Las víctimas no murieron en callejones ni lugares abandonados. Murieron en sus propias casas. Henry Louis Wallace no forzaba cerraduras. Tocaba la puerta, sonreía, se presentaba como alguien de confianza… y entraba. Entre 1992 y 1994, mujeres jóven

For nearly three decades, Dee Sumpter has been living without her daughter. Stream 20/20 'Lock The Door Behind You' on Hulu: https://abcn.ws/3DlnzKm Read more: https://abcn.ws/3FINmiq | ABC 20/20

It was such a delight to sit down with the ladies of The Real yesterday! Who remembers one of our first #FindingYourRoots stories about Oprah Winfrey's great-great grandfather? Watch all-new episodes on Tuesdays at 8|7c on PBS. | Henry Louis Gates, Jr.

NEW TRUE CRIME | A serial killer who knew his victims. A mother who would stop at nothing to find the killer. Now, a never-before-seen prison interview with the killer and the only surviving victim speaks out. The new 20/20 premieres Friday at 9/8c on ABC - and stream on Hulu. | ABC 20/20