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.

SVU detectives are trained and equipped to handle cases involving sexual assault, abuse and interpersonal violence. Hear from one detective what it's like working a real-life SVU.

Lisa McVey was 17 years old when she was abducted, beaten and raped by a serial killer—and managed to survive. We spoke with McVey, now a master deputy in the Hillsborough County (Florida) Sheriff's Office, about how she outsmarted her kidnapper, Bobby Joe Long.

We spoke with legendary FBI profiler John Douglas about how a childhood injury may have pushed Joseph Paul Franklin to serial murder.

On Halloween 1974, a Texas man poisoned his young son with cyanide-laced candy in an attempt to collect the insurance money. He became known as 'The Candy Man.'

A popular theory claims three childhood behaviors—animal cruelty, fire setting and persistent bedwetting—can indicate a serial killer in the making.

The serial killer seemed to be a well-adjusted adult. But his crimes included binding, torturing, raping and ultimately murdering 33 male victims, some as young as 15 years old.

By the time Nassar was sentenced to 60 years in federal prison, his accusers numbered in the hundreds⁠—mostly athletes training and competing under the auspices of USA Gymnastics.