One year after a man was found stabbed to death inside a tent at Burning Man — the knife still lodged in his neck — his killer remains at large and investigators still can't account for the final four hours of his life. Vadim Kruglov, a 37-year-old Russian-born man living in Washington state, was discovered in a pool of blood in Nevada's Black Rock Desert on Aug. 30, 2025, while tens of thousands of festivalgoers gathered nearby to watch the burning of the festival's iconic wooden effigy. An autopsy found no defensive wounds, meaning he likely never saw the attack coming. New details from a yearlong investigation reveal Kruglov had been released from a temporary on-site hospital around 5 p.m. that evening. By 9:14 p.m., he was dead. What happened in those four hours remains a mystery. The murder weapon yielded multiple DNA profiles, his phone has yet to be unlocked, and two unidentified men seen with him hours before his death have never been found — despite hundreds of tips.