Cold Case Files: DNA Speaks (2023)

S01E09 Death Downstream

In 1993, the lifeless body of 16-year-old Shawna Yandell is discovered in the Yakima River in Washington State, prompting investigators to initially focus on her inner circle. As time passes, the investigation stalls, leaving the case unsolved. However, a breakthrough in DNA technology eventually uncovers startling evidence, pointing to a ruthless murderer who had remained under the radar, surprising everyone involved.