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

Police must analyze a long emotional and rage-filled 911 call. Was it made by a distraught husband or a killer trying to cover his tracks? Join us tonight 10/9c for "On The Case With Paula Zahn" on ID | On the Case with Paula Zahn

A college coed disappears and her family launches a desperate investigation to find her. What they discover will change their lives forever. Don't miss the all-new episode of "On The Case With Paula Zahn" tonight at 10/9c on ID | On the Case with Paula Zahn

Paula Zahn on what makes On The Case powerful. All-new episodes begin Sunday at 10/9c on Investigation Discovery. | On the Case with Paula Zahn