Tiffani McInnis was a teenager when her mother, Kimberly Langwell, failed to return home from work, leaving her family searching for answers. For decades, Tiffani lived with uncertainty, holding on to the hope that she would one day learn what happened to her mother. More than 20 years later, detectives in Beaumont, Texas, received critical information that would breathe new life into the cold case. Their investigation led to a secret grave and a horrific discovery that finally revealed Kimberly Langwell's fate. 

In 1984, three teenage girls went missing from the same Long Island area within months of each other. Fifteen-year-old Kelly Morrissey walked out of her home on June 12 and was never heard from again. Five months later, her friend Theresa Fusco, 16, vanished after leaving her job at a local roller rink. And then four more months after that, 19-year-old Jackie Martarella never showed up for a shift at a Burger King. Nearly 41 years later, a breakthrough involving DNA from a smoothie straw has finally brought new answers in one of the cases.