The person at the center of this case
Alvin Alton Long Soldier Jr.
Missing Person · Open
5 years waiting · since 2020
Missing Person: Alvin Alton Long Soldier Jr
Justice for Alvin Alton Long Soldier Jr. — the trail went cold in 2020, but the truth hasn't.
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Key leads to think about
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person
Lead #1Why has there been no contact with family for six years—was there a specific event or circumstance that preceded the disappearance?
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location
Lead #2What was Alvin's routine in Vermillion, and did he have regular places he frequented that should be revisited?
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witness
Lead #3Are there individuals who saw Alvin around December 10, 2020, or in the weeks following who could provide details about his state of mind or plans?
Alvin Alton Long Soldier Jr., a 51-year-old American Indian male, was last known to be in Vermillion, South Dakota on December 10, 2020, and has not contacted his family for approximately six years. His whereabouts remain unknown, and the circumstances surrounding his disappearance have not been publicly detailed. The Bureau of Indian Affairs continues to investigate this case, and anyone with information about his location or welfare is urged to come forward.
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Official wording
Source Narrative
NamUs case MP158972. Missing person: Alvin Alton Long Soldier Jr.
Last known contact: 2020-12-10 in Vermillion, Clay, SD. Circumstances: Alvin was last known to be in Vermillion, SD and has not contacted his family for approximately 6 years.
Demographics: 51 years, Male, American Indian / Alaska Native. Physical description: 6 ft 1 in, 170 lbs, hair: Black, eyes: Brown.
Investigating agency: Bureau of Indian Affairs | I-26-0000000252.
Timeline of Events
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2020-12-10
Last Known Contact
Alvin Alton Long Soldier Jr. was last known to be in Vermillion, SD on December 10, 2020
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:December 10, 2020
Last Updated:September 26, 2026
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Any information, no matter how small, could be crucial to solving this case.
Phone: 6053412123
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Case Information
Incident:December 10, 2020
Last Updated:September 26, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 6053412123
You can remain anonymous