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251 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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In the winter of 1984, an 18-year-old man named Aaron Mosus Standing Bear vanished. A member of the Cheyenne River Sioux Tribe, he was last seen in Denver, Colorado, with the belief that he was making his way to California. However, after his presence was confirmed in Denver, all communication ceased, and he was never heard from again. At the time of his disappearance, Aaron was described as being between 5'8' and 6'0' tall, with a weight of approximately 180 to 200 pounds. He had black hair and ...Read More
Last Seen: Jan 01, 1984

Victim Details

Mar 08, 2016

Mar 19, 2024

Aaron

Standing Bear

58

18

68 inches

72 inches

180 lbs

200 lbs

American Indian / Alaska Native

Male

Jan 01, 1984

Denver

Colorado

Denver County

No

24624

Cheyenne River Sioux Tribal Police

Eagle Butte

South Dakota

Dewey County

57625

Larry LeBeau

Detective

2105 D Street, South Dakota

6059644567

Tribal

Law Enforcement

CRA-16-19

Cheyenne River Sioux Tribal Police

Black

Brown

Brown

05/23/2026


Area Last Seen: