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 #1What is the significance of Marc's ties to Montana and has he been located there?
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person
Lead #2Are there any known associates or family members in Montana who may have information about his disappearance?
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timeline
Lead #3What were the circumstances and context of his last known contact on December 10, 2022?
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. The case remains active with the Bayfield County Sheriff's Office seeking information about his whereabouts and circumstances of disappearance.
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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
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2022-12-10
Last Known Contact
Marc Duane Arthun was last seen on December 10, 2022, in Mason, Bayfield, Wisconsin.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:December 10, 2022
Last Updated:September 27, 2026
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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 27, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 7153736300
You can remain anonymous