Officials: Half-brother of missing Utah man died of hypothermia

Sep 29, 2021, 8:05 PM
Yellowstone National Park officials continue to search for a missing Utah man. Kim Crumbo has been ...
Yellowstone National Park officials continue to search for a missing Utah man. Kim Crumbo has been missing since Sept. 19. Mark O'Neill, who was with Crumbo was found on Sept. 20. According to an autopsy, officials say O'Neill's cause of death was hypothermia. Photo credit: Yellowstone National Park

YELLOWSTONE NATIONAL PARK, Wyo. — An autopsy into the death of 67-year-old Mark O’Neill has been completed Yellowstone National Park officials announced Wednesday.

O’Neill, of Chimacum, Washington, died of hypothermia, according to the autopsy. O’Neill along with his half-brother 74-year-old Kim Crumbo, of Ogden, never returned from a four-night backcountry trip to Shoshone Lake on Sept 19. O’Neill’s body was found on Sept. 20 on the east shore of Shoshone Lake. 

However, Crumbo is still missing. Additionally, just last weekend, park officials announced they were turning their efforts to a search and recovery for Crumbo. Sonar equipment is being used by park officials to search for clues in the water. 

Park rangers say the incident remains under investigation. Officials also say the search for Crumbo will continue as conditions allow.

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Officials: Half-brother of missing Utah man died of hypothermia