The convicted killer and father of 12 tortured and sexually abused his children for years, exerting such power that some of them murdered at his command.

When Mary Bailey was 11 years old, her mom asked her to shoot her abusive stepfather. She obliged. She speaks with us about how that action has affected her life.

Aside from the emotional pain and physical injury it causes, bullying among kids can also result in death. Young bullies have murdered their victims. Bullying at school has also led to some victims lashing out and killing.

Amish men are rarely prosecuted and jailed for sexual abuse against children. What's being done to expose these crimes?

The murder of a Chinese woman by her American husband in Columbia, Missouri was a long and painful case for police investigators, attorneys and, most of all, her parents.

In October 2003, eight-year-old Josef Smith was beaten to death by his parents, Joseph and Sonya Smith. The Smiths were members of a church that promotes disciplining children in a way that some have said is abusive.

In 1997, the 19-year-old British au pair was charged with the first-degree murder of 8-month-old Matthew Eappen.

For many years, a Georgia woman ran an underground network out of her Atlanta home in order to hide children who'd allegedly been abused. Some feel she was a hero, while others believe she was a kidnapper and vigilante.

Polygamy is illegal in most of the world, but it is practiced by about 2 percent of its population. We investigate why it is rarely prosecuted in the United States.

The 1980s McMartin Preschool case was, and currently remains, the longest and most expensive criminal trial in American history. Seven teachers at the school were accused of abusing hundreds of students, sometimes as part of Satanic rituals.