Imagine coming face-to-face with a killer hours before he took the life of your loved one, and not knowing it. That’s exactly what happened to a man named Steve Relford, the son of BTK serial killer victim Shirley Vian. He was just a child at the time, but over forty years later he’s retelling the chilling moment for the Investigation Discovery documentary special BTK: A Killer Among Us, which will air on February 17 at 10 pm. Watch the exclusive clip above to see how Dennis Rader terrorized the Vian family, and don’t forget to subscribe to our YouTube channel

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