Delphi, Indiana, February 13th, 2017, 1:30 in the afternoon. Kelsey German dropped her younger sister Libby and Libby's best friend Abby Williams [music] at the trailhead and drove away. They were going to hike the Monon High Bridge Trail, >> [music] >> an old railroad trestle over Deer Creek, a local landmark, a perfectly ordinary Monday afternoon. Abigail Williams was 13 [music] years old. Liberty German was 14. At 2:07 p.m., Libby posted [music] a Snapchat photo of Abby walking ahead of her on the bridge. It was the last photo she ever posted. Then they noticed a man [music] behind them on the bridge. He was walking toward them. Libby quietly activated the camera on [music] her phone. She recorded him, his cap pulled low, his hands in his pockets, his walk across those wooden planks toward them. >> [music] >> Guys. Hi. Down the hill. He had a gun. Out of fear, they complied. Their bodies [music] were found the next morning. Near Deer Creek, a quarter mile from the bridge, [music] an unspent .40 caliber bullet between them, their throats cut, their bodies covered with sticks. >> [music] >> Indiana State Police released the footage publicly, a grainy image, two words, shared by millions. For five and a half years, no arrest. [music] Here is what nobody knew. Three days after the murders, >> [music] >> Richard Allen called police himself, a pharmacy technician at the CVS in Delphi, a man who had lived in that town for over a decade, a man who knew those trails. He told police [music] he had been on the bridge that day. His tip was filed under a misspelling of his last name, marked as cleared. He was not investigated. In September 2022, a volunteer file clerk pulled a folder and stopped. [music] She recognized the error. Investigators re-interviewed Allen in October 2022. >> [music] >> He was arrested on October 26th. I killed Abby and Libby. November 11th, 2024, [music] convicted on all four counts, sentenced to 130 years. Liberty German was 14 [music] years old. She was on that bridge. She understood, and she quietly turned on her camera. If you or someone you know need support after violent [music] crime, the National Center for Victims of Crime is available. Follow [music] Grave File TV, a new investigation every week, because the cases that get shared [music] are the ones that don't get forgotten.