Sergey Cherepov was in the United States on business for a few days with his coworkers from Aeroflot Russian Airlines. They all decided to go on a day hike together. At one point, Sergey walked away from the group and never returned. He had suffered a head injury due to a fall about ten hours prior to the day hike and his head was bandaged. He was not located after extensive search and rescue missions. His wallet, cell phone and backpack were found inside his hotel room in Tukwila.