A gruesome video on a stolen SD card exposes Brian Steven Smith's secret double life.

Yaser Said speaks about the night he fatally shot his teenage daughters near Dallas, Texas.

Denali Brehmer agrees to kill her best friend for a man she met online offering millions for murder.

Bo Pete Jeffrey tells a different story about the brutal beating and murder of his wife.

Tyler Hadley discusses how he, as a troubled 17-year-old, bludgeoned his mother and father to death.

The oldest serial killer in America reveals new information about his crimes.

The oldest serial killer in America reveals new information about his crimes

Sarah White, the longest serving inmate of the Indiana Women's Prison, meets with David Scott.

A Neo-Nazi turned Islamic jihadist shoots two of his roommates after an argument.

Rebecca Keller and Keri Murphy murdered Murphy's mother after she did not approve of their high school relationship; in her first TV interview ever, Keller explains to David Scott her role in the killing and even tries to justify why she did it.

She went by "Angel," but Alicia Keator was far from benevolent; Keator and her boyfriend killed and robbed John Fernandez, a 65-year-old man who used a wheelchair, after she agreed to take care of him in exchange for free rent.