A cheerleader from small-town Pennsylvania vanished after becoming trapped in a sex-trafficking nightmare in NYC. Her desperate mom confronted dangerous pimps as surprising clues emerged on social media.

One March morning in 1999, 14-year-old Leanne Marie Hausberg walked out of her Brooklyn home and was never seen again.

Their bones may have been found, but their identities are still missing. Inside an office of the New York City Medical Examiner, dozens of clay faces are perched on shelves. They're the faces of people whose skeletons have been found in New York City but have never been identified.

When young Chelsea Michelle Cobo vanished in 2016, her mother became a private eye of sorts, uncovering her daughter's secrets and imperilingher own safety along the way to get to the truth.

On Oct. 24, 1978, Ethel Louise Atwell of Newark, New Jersey, went to work on Staten Island and never returned home. Workers heard the 46-year-old scream from the parking lot. By the time police arrived, Ethel had disappeared.

Kassandra Ramirez was a 25-year-old aspiring chef who disappeared from the Bronx in September 2018. Her family says one week before Kassandra disappeared she testified to a grand jury that she was raped by a family friend a few months before.