Never-before-broadcast video gives insight into the mind of serial killer Henry Louis Wallace, who confessed to 11 murders from 1990-1994, and his only surviving victim speaks in his first interview.

A new "20/20," in collaboration with Plum Pictures, features an exclusive interview with Laura Day, nearly a decade after her first-degree capital murder conviction for her 6-year-old stepson's death.

Aka "Wave of Deceit"