Becky Little

After their 2013 escape from Ariel Castro's house of horrors, where he repeatedly raped and tortured them, the three women are now working to help other survivors.

Kathy (Kate) Ann Jewell fled her home when her boyfriend, John Branden, raped and attempted to kill her. After that, he disappeared—and she spent years trying to ensure he'd never find her.

The U.S. originally started the federal witness protection program to protect people from the mob. And the people who received protection? They were usually part of the mob too.

Because of the lack of statutes acknowledging Munchausen by proxy—and the general confusion about what this abuse looks like—law enforcement and courts often struggle with how to prosecute this type of medical child abuse, say experts.

When new evidence arises, or new technology becomes available, investigators may need to take a second look at a corpse.

Kamiyah Mobley was 16 years old when she discovered that Gloria Williams, the woman she knew as her mother, was actually her kidnapper. Williams had abducted Kamiyah from Shanara Mobley back in 1998 on the day she was born and raised her as a daughter ever since.

Veronica Compton tried to murder a woman to make it look like the police had arrested the wrong man, Kenneth Bianchi, in the Hillside Strangler killings.

Police have solved, or are close to solving, a number of cases that have been cold for decades. Investigators are using new technology and research techniques and re-examining leads that previous investigators may have ignored.