The person at the center of this case
Marc Duane Arthun
Missing Person · Open
3 years waiting · since 2022
Missing Person: Marc Duane Arthun
Justice for Marc Duane Arthun — the trail went cold in 2022, but the truth hasn't.
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Key leads to think about
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location
Lead #1Why does Marc have ties to Montana, and could he have traveled there after December 10, 2022?
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person
Lead #2What was Marc's mental and physical state in the days before his disappearance?
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contact
Lead #3Who was the last person to have contact with Marc, and what was the nature of that interaction?
Marc Duane Arthun, a 53-year-old man, was last seen on December 10, 2022, in Mason, Wisconsin. He has connections to Montana that investigators are exploring as part of the ongoing search. Despite months of investigation by the Bayfield County Sheriff's Office, his whereabouts remain unknown and anyone with information is urged to come forward.
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Official wording
Source Narrative
NamUs case MP117473. Missing person: Marc Duane Arthun.
Last known contact: 2022-12-10 in Mason, Bayfield, WI. Circumstances: Last seen on December 10, 2022.
Marc Arthun does have ties to the State of Montana. Demographics: 53 years, Male, White / Caucasian.
Physical description: 5 ft 11 in, 210 lbs, hair: Gray or Partially Gray, eyes: Hazel. Investigating agency: Bayfield County Sheriff's Office | B1-23-099 | 2023-03-22.
Timeline of Events
👁️
2022-12-10
Last Known Contact
Marc Duane Arthun was last seen in Mason, Bayfield, Wisconsin on December 10, 2022.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:December 10, 2022
Last Updated:September 16, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 7153736300
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Case Information
Incident:December 10, 2022
Last Updated:September 16, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 7153736300
You can remain anonymous