YELLOWSTONE NATIONAL PARK, Wyo. — Yellowstone National Park officials say an autopsy has determined that a man whose body was found on the shore of a lake died of hypothermia.
The body of 67-year-old Mark O'Neill, of Chimacum, Washington, was found on Sept. 20 on the eastern shore of Shoshone Lake. O'Neill's brother, 74-year-old Kim Crumbo, of Ogden, Utah, remains missing.
The men were on a four-night backcountry trip and reported overdue. Park officials said Wednesday they will continue to look for Crumbo as conditions allow. A vacant campsite was found on the lake’s south side.
Shoshone Lake averages 48 degrees, a temperature that can be deadly within half an hour.
