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Case Description

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Summary based on the NamUs case record (MP140117) and 1 other source
Mason Douglas McKay, a 44-year-old man, vanished under concerning circumstances, prompting an ongoing investigation by the Boulder City Police Department. His last confirmed communication was a text message sent on February 16, 2025, stating he had boarded a Regional Transportation Commission bus but was unsure of his location. Initial reports indicated he was last seen in Boulder City on that day. However, further investigation revealed that he was last seen getting off an RTC bus at Maryland Parkway and Harmon Avenue in Las Vegas on February 18, 2025. McKay is considered endangered due to a medical condition that requires medication, which he did not have with him. His family is extremely worried, and authorities have been actively seeking the public's help for any information regarding his whereabouts.

At the time of his disappearance, McKay was described as being 6'2' tall and weighing approximately 220 pounds, with blue eyes and brown and gray hair. He has a distinct sun-shaped or star-shaped scar on his upper right arm. He was last seen wearing a navy blue Patagonia ball cap, a dark-colored long-sleeve zip-up hoodie, dark sweatpants, and dark-colored New Balance shoes with a white 'N' on the sides. He was also carrying a faded black High Sierra backpack. Notably, it is believed he did not have his glasses with him, which could have impaired his ability to navigate or seek help. McKay also wears a brace on his left wrist due to partial paralysis in his left hand.

The investigation into Mason McKay's disappearance has involved a thorough review of hospital records, surveillance footage, phone data, and transit records by the Boulder City Police Department. There was a report that he may have been treated for a head injury at a hospital in Las Vegas before taking a bus to the UNLV area, after which he was not seen again. Authorities have also explored leads suggesting he might have been in the vicinity of I-15 and Apex after his last confirmed sighting. The case has been entered into the National Missing and Unidentified Persons System as case #MP140117. Overall, the circumstances surrounding his disappearance remain unclear, and the lack of contact since February 18, 2025, has caused significant concern for his well-being.

Last Seen: Feb 18, 2025

Links to Additional Sources (1)

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Possible Unidentified Matches (1)

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.

75%Possible
John Doe — Las Vegas, Nevada - unidentified case UP154182
John Doe — Las Vegas, Nevada
UP154182 • Found Nov 27, 2025
View case
Sex ✓Male
Age 60%Est. 40–70 vs 44
Race 100%White
Location 100%7 mi away, same county
TimingFound 9 months after last seen
Height 84%5'8"–6'0" vs 6'2"

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.