Crime Solvers Central
CSC
223 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.
Case Description
Any updates on this case? Let us know!
Nicholas Jeffrey Mostert, a 20-year-old from the Salt Lake City, Utah area, was last seen in Yellowstone National Park on June 16, 2009. Witnesses reported that he jumped from an observation deck along the rim of the Grand Canyon of the Yellowstone into the Yellowstone River. He was then swept over the 308-foot Lower Falls.

Following the incident, park officials initiated a search. Searchers in a park helicopter scoured the 20-mile-long canyon, which ranges from 800 to 1,200 feet deep. ...Read More
Last Seen: Jun 16, 2009
Victim Details

Jan 28, 2026

Jan 28, 2026

Nicholas

Jeffrey Mostert

20

20

5'10 inches

White

Male

Jun 16, 2009

Yellowstone National Park

Wyoming

Yellowstone National Park

Yellowstone National Park

307-344-2640

01/28/2026