SNEAK PEEK: The Promise

Catch up with NBC News Clone on today's hot topic: Sneak Peek Promise N347746 - Breaking News | NBC News Clone. Our editorial team reformatted this story for clarity and speed.

When a 20-year-old honors student goes missing after work, her family suspects the worst. As police investigate, questions surrounding her disappearance begin to hit close to home. Josh Mankiewicz reports on a mystery that would take more than 20 years to solve.