Sixteen-year-old Ali Lowitzer vanishes after getting off the school bus.

A 13-year-old vanishes while walking to her school bus stop in Nashville.

A popular fraternity brother suddenly goes missing, leaving a cryptic note.

A retired firefighter goes missing, and blood is found in his garage.

When Nancy Moyer goes missing, police discover secret liaisons.

The family of a missing teenager dissects the time before he vanished.

Rumors surround two missing SD teens, but none are close to the truth.

Thirty years after a mother and son vanish, the truth is finally uncovered.

A 16-year-old boy got up, walked out of his home, and was never seen again.

Savannah Spurlock disappears after leaving a bar in Kentucky.

A college student attending a Model UN conference disappears in Chicago.

In 2017, 8-months-pregnant Akia Eggleston never arrives at her baby shower.

Tara Calico goes on her daily morning bike ride, but never returns home.

A 27-year-old medical student fails to show up for a flight to Miami.

Elaine Park is never seen again after leaving her boyfriend's apartment.

A 29-year-old mom never returns after heading out for a drum circle.