RIVERTON, Wyo. (AP) — An investigation has determined the time of death of a Utah man who was mauled by a bear while working in the Bridger Teton National Forest in northwestern Wyoming.

The Riverton Ranger reports (http://bit.ly/1sdq8YB) investigators used the time stamp on photographs taken by 31-year-old Adam Stewart of Virgin, Utah, to determine he was killed at about 5 p.m. on Sept. 4. An autopsy found he died of blunt force trauma during an encounter with a bear. Officials have not said what kind of bear was involved.

Fremont County Coroner Ed McAuslan says the last picture Stewart took was at 3:30 p.m. on Sept. 4. Search and rescue volunteers determined where the last photo was taken and how long it would have taken Stewart to walk to the heavily timbered area where his body was found on Sept. 12.

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