A mother arrives home to have lunch with her teenage daughter and walks into a nightmare she will never forget. On the Case with Paula Zahn investigates tonight at 10/9c. | Investigation Discovery

A young woman's late-night call from a pay phone is transformed into the scene of a terrifying abduction. On the Case with Paula Zahn begins Sunday at 10/9c. | Investigation Discovery

This mother's relentless investigation of her daughter's disappearance leads police to a terrifying string of murders. On the Case with Paula Zahn begins tonight at 10/9c. | Investigation Discovery

When a young woman disappears on a cold night in Breckenridge Colorado, one of the state's darkest mysteries begins. Join us for On the Case with Paula Zahn tonight at 10/9c. | Investigation Discovery

When a young mother vanishes, her trail goes cold. Until a shocking discovery reveals that history repeats itself. On the Case with Paula Zahn investigates tonight at 10/9c. | Investigation Discovery