Rocky Mountain National Park officials say ranger Jeff Christensen died of head injuries from a fall on the same day he left to patrol the park's rugged backcountry.
Christensen's body was found after an intensive, eight-day search over 26 square miles of mountainous wilderness. He's believed to have died between 6:00 p.m. and midnight on July 29th, which is the same day he left on a patrol.
The information was released in an autopsy report done by the Larimer County Coroner's Office.
National Park Service spokesman Al Nash says park officials say they're still investigating the circumstances of Christensen's death. Christensen is believed to be the first ranger to die on duty in the park's 90-year history.
A hiker found the 31-year-old's body near Spectacle Lakes at about 13,000 feet Saturday, three miles east of where he had begun his patrol. The site was two to three miles away from an area where searchers heard gunshots and radio static that they thought might have been Christensen trying to signal them in the middle of last week.