Each stand-alone episode spotlights some of the most amoral and calculating siblings who were caught red-handed in a web of lies. Psychologists, detectives, and investigators take viewers inside the chaos of manipulative brothers and sisters who were blinded by deceit and revenge. As the twists and turns of each investigation unfolds, viewers will follow along as detectives capture the heinous criminals. All 12 hour-long episodes result in justice for the victim's families. Written by Oxygen Media

In one of the most tragic and brutal crimes in the history of the Great Plains, five teens playing by a campfire are ambushed when a trio of shotgun-wielding brothers targets them.

An immigrant family's American dream turns into a nightmare when a devious sister manipulates her younger valedictorian brother into committing murder.

Telling the insane stories about a few of the most maniacal siblings in history through these exclusive interviews and firsthand accounts.

Telling the insane stories about a few of the most maniacal siblings in history through these exclusive interviews and firsthand accounts.

Telling the insane stories about a few of the most maniacal siblings in history through these exclusive interviews and firsthand accounts.

Telling the insane stories about a few of the most maniacal siblings in history through these exclusive interviews and firsthand accounts.

Telling the insane stories about a few of the most maniacal siblings in history through these exclusive interviews and firsthand accounts.

Telling the insane stories about a few of the most maniacal siblings in history through these exclusive interviews and firsthand accounts.

Telling the insane stories about a few of the most maniacal siblings in history through these exclusive interviews and firsthand accounts.

Telling the insane stories about a few of the most maniacal siblings in history through these exclusive interviews and firsthand accounts.