Highway of Horrors (S05E01)

In 1992, college student Tammy Zywicki disappears after her car breaks down on a highway. Her loved ones launch a desperate search for her, but the discovery of her body, 500 miles away from the location of her disappearance, offers little evidence to identify her killer. Law enforcement encounters numerous dead ends, with leads and suspects failing to materialize. Years later, advancements in DNA technology bring a glimmer of hope to Tammy's family, but they fear it might be too late for them to achieve the justice they have long sought.