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Case Description

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Summary based on the NamUs case record (MP161426)
In the autumn of 2017, a 58-year-old Russian man named Sergey Cherepov was visiting the United States on a business trip with his colleagues from Aeroflot Russian Airlines. On September 14, the group decided to enjoy the natural beauty of Washington state with a day hike near North Bend. They made their way to the Goldmyer Hot Springs, a popular destination nestled in the Cascade Mountains. At some point during their outing, Cherepov walked away from his companions and was never seen again. Compounding the concern for his well-being was a head injury he had sustained in a fall approximately ten hours before the hike, which required a bandage. His personal belongings, including his wallet, cell phone, and backpack, were later found undisturbed in his hotel room in Tukwila.

The alarm was raised when Cherepov's friends reached their designated meeting point and he failed to appear. After their own search proved fruitless, they contacted the authorities the following day. The King County Sheriff's Office initiated an extensive search and rescue mission in the rugged terrain surrounding Snoqualmie Mountain. The search was fraught with challenges, as the area is characterized by dense forests and thick vegetation, making visibility difficult. Rescuers combed the trails, fearing he may have had an accident and fallen off the path where he would be obscured by the dense brush. The weather also became a significant obstacle, with rain further complicating the search efforts. Despite the dedicated efforts of the search teams, no trace of Cherepov was found. After five days of intensive searching, the official search was suspended.

The disappearance of Sergey Cherepov left his family with unanswered questions and a profound sense of loss. In a poignant effort to find closure, his son, who shares the same name, traveled from Russia to Washington in May of the following year. He was accompanied by his wife and members of the King County Sheriff's Search and Rescue team as he retraced his father's last known steps in the area of Goldmyer Hot Springs. Authorities stated that Cherepov had reportedly felt unwell and decided to head back to the car alone, at which point he mistakenly took a wrong turn. The case remains one of the few unsolved missing person cases for the lead detective, who noted that witnesses had last seen him walking near a washed-out log bridge. Despite the passage of time, the investigation into what happened to Sergey Cherepov has not yielded any definitive answers, leaving his whereabouts a mystery.

Last Seen: Sep 14, 2017

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Possible Unidentified Matches (5)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

81%Moderate
John Doe — Fall City, Washington
UP87184 • Found Jul 23, 2020
View case
Sex ✓Male
Age 100%Est. 48–62 vs 58 when missing
Race 100%White
Location 100%7 mi away, same county
TimingFound 3 years after last seen
Hair 100%Gray vs Gray
Eyes 100%Brown vs Brown
78%Possible
John Doe — Seattle, Washington
UP51986 • Found Jan 1, 2018
View case
Sex ✓Male
Age 60%Est. 30–60 vs 58
Race 100%White
Location 96%27 mi away, same county
TimingFound 4 months after last seen
Height 84%5'5"–5'8" vs 5'10"
Weight 100%173 lb vs 160 lb
Hair 100%Gray vs Gray
77%Possible
John Doe — Buckley, Washington
UP51984 • Found May 8, 2018
View case
Sex ✓Male
Age 100%Est. 58–72 vs 58
Location 96%26 mi away, same state
TimingFound 8 months after last seen
Height 100%5'9"–6'3" vs 5'10"
76%Possible
John Doe — Tacoma, Washington
UP120946 • Found Nov 26, 2023
View case
Sex ✓Male
Age 60%Est. 30–99 vs 58 when missing
Race 100%White
Location 93%35 mi away, same state
TimingFound 6 years after last seen
Height 100%5'11" vs 5'10"
Weight 100%161 lb vs 160 lb
Hair 100%Gray vs Gray
75%Possible
John Doe — Seattle, Washington - unidentified case UP163249
John Doe — Seattle, Washington
UP163249 • Found Jul 4, 2026
View case
Sex ✓Male
Age 60%Est. 18–100 vs 58 when missing
Race 100%White
Location 96%27 mi away, same county
TimingFound 9 years after last seen
Height 100%5'10" vs 5'10"
Weight 19%229 lb vs 160 lb
Hair 100%Gray vs Gray
Eyes 100%Brown vs Brown

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.

Unidentified photos are blurred because many are post-mortem. Tap a photo to reveal it.