Sarah Butler was 20 years old, home for Thanksgiving break, when she borrowed her mother's minivan and told her family she was going to see a friend. She never came home. What investigators uncovered over the weeks that followed wasn't just a missing persons case. It was a calculated pattern of predation hiding behind a screen — on a social discovery app called Tagged, where a security guard named Khalil Wheeler-Weaver was offering women money to meet him late at night. Nine days after Sarah vanished, her body was found in Eagle Rock Reservation in West Orange, New Jersey. Strangled. Partially covered in leaves. Less than fifteen miles from where she had celebrated her last Thanksgiving Eve. But Sarah was not his only victim. Robin West. Joanne Brown. A survivor named Tiffany Taylor who lived to testify. And a fifteen-year-old girl whose remains went unidentified for over two years. What broke the case wasn't just digital forensics, cell tower data, or surveillance footage — though all of it was there, hiding in plain sight on his own phone. It was Sarah's sister, who logged into Sarah's Tagged account, built a fake profile, and lured him back to a meetup where police were already waiting. In December 2019, an Essex County jury found Khalil Wheeler-Weaver guilty on all counts — three murders, kidnapping, aggravated sexual assault, attempted murder, and arson — after deliberating for less than three hours. In 2021, he was sentenced to 160 years in prison. His appeal was denied in 2024. This is the full story of Sarah Butler — and the digital trail that exposed a serial killer hiding behind a dating app. #SarahButler #TrueCrime #TrueCrimeCase #OnlinePredator #TaggedApp #KhalilWheelerWeaver #TrueCrimeDocumentary #MissingPersons #OnlineDatingSafety #SerialKiller #TrueCrimeYouTube #EssexCounty #ColdCaseFiles #DigitalPredator