This story originally aired on Nov. 18, 2023. Sarah Yarborough was a 16-year-old honors student on her way to drill team practice, when she was found murdered on the campus of her high school. Investigators had DNA evidence and eyewitnesses, but it would take almost three decades to identify Sarah’s killer. As “48 Hours” contributor Natalie Morales reports, this case had a big impact on her family, friends and generations of investigators.