Nineteen-year-old college student Brook Baker is killed in her off-campus home; two years later, 21-year-old Erika Norman goes missing from the same university, leading detectives to examine their last days and discover the killer.

When Gloria Pointer is killed walking to school, detectives re-trace her steps looking for clues.

A weekend of housesitting turns into a deadly nightmare for 16-year-old Cassie Jo Stoddart.

Security footage from LaNell Barsock’s last day sends investigators in a new direction.

Investigators delve into forensic evidence from the scene and mobile data to solve the crime.

Cell phone records help investigators discover what happened to 21-year-old Kelsie Schelling.

A witness comes forward to reveal crucial details of murdered U.S airman Nathan Paet’s last day.

Investigators discover a blurred image of Mollie Tibbetts jogging followed by a black car.