How Walmart Receipts and Cell Towers Are Solving Cold Cases in 2026

He bought a beanie at Walmart five hours before four college students were murdered — and that single receipt helped put him away for life. On November 13, 2022, four University of Idaho students were stabbed to death in an off-campus house in Moscow, Idaho. The DNA on the knife sheath identified Bryan Kohberger — but the case against him was built on a Walmart receipt, thirteen surveillance visits, and a phone that went dark for exactly the hours prosecutors needed to prove the drive from Pullman to Moscow and back. Across the country, the same forensic playbook was being used to hunt a serial killer who had operated for thirteen years on Long Island. Rex Heuermann thought he had outsmarted the police with four burner phones. He hadn't. And right now, in Pima County, Arizona, the FBI is using that exact same playbook to trace a 25-liter Ozark Trail Hiker Pack sold exclusively at Walmart — back to whoever took 64-year-old Nancy Guthrie from her home on February 1, 2026. This is how the most ordinary objects in your life — a receipt, a backpack, a cell phone in your pocket — are quietly solving the cases the police gave up on decades ago. 📂 ABOUT BURIED SECRETS Buried Secrets is an investigative cold case channel digging into the forensic breakthroughs, court records, and FBI case files behind America's most chilling unsolved — and recently solved — crimes. We don't read headlines. We read affidavits, indictments, and forensic reports. Every claim is anchored to a date, a document, or a quoted official. Some secrets should never stay buried. 🔔 Subscribe so you don't miss the next case file 👍 Like the video if the evidence got under your skin 💬 Drop the cold case you want us to dig into next in the comments