When a killer strikes, most of us think first of the victim -of their struggle, of their violent death. But murderers do more than just kill their targets-they irreparably harm their own family--often leaving them physically battered, emotionally scarred, financially ruined and ostracized by neighbors and friends. A killer's kin--his wife, sons or daughters--are the unrecognized victims of his violent crimes. "I Lived With a Killer" tells their compelling stories. At the heart of each episode lies a mystery. Killers work in secret and often lie most effectively to their loved ones. We ask: how did our family member finally come to know there's a killer living under their roof? And what happened after they found out?