After a family celebration, 18-year-old Nia Wilson and her two sisters decided to take public transportation back home to Oakland, California. But just minutes after texting their father, the sisters were brutally targeted at a train station. The knife attack sparked a city-wide search for the perpetrator and ignited a powerful movement against racial injustice.

Residents of small-town Robeson, Pennsylvania were stunned when 23-year-old Ashley Kline went missing on New Year's Eve. The 12-day search turned up several suspects until investigators uncovered suspicious text messages. The gruesome truth rocked the community.

Travel Blogger, Carla Stefaniak, went to Costa Rica to celebrate her 36th birthday. But when she was to arrive back home to Miami, her awaiting loved-ones realized she never got on the plane. Carla's friends and family recount the terrifying details of the search to find Carla.