A teenager's quick thinking captured her killer on camera just moments before her death. In 2017, the brutal murders of Abby Williams and Libby German devastated Delphi, Indiana. The cornerstone of the investigation came directly from Libby's smartphone. She secretly recorded a grainy photo of a suspect approaching them, widely known as the bridge guy. A chilling audio recording also captured his voice ordering the girls down the hill. For over years, detectives could only rely on these small clues to drive the manhunt. The elusive case finally broke when investigators arrested local resident Richard Allen, bringing crucial answers to a haunting mystery.