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JACKSON, Wyo. (AP) -- The body of a 24-year-old man was found in a creek, and investigators were treating it as a possible homicide.
They said Jonathan Koberna, who had moved here from Utah, had a broken jaw, a cut on top of his head and may have been in a fight. An autopsy, however, found those injuries did not cause his death.
"They really aren't fixing a cause of death at this time," Teton County Sheriff's Capt. Jim Whalen said. "They're kind of scratching their heads."
A man walking his dog found Koberna's body in Flat Creek around 1 p.m. Wednesday. Investigators do not believe he drowned.
Whalen said he may have died between 1 a.m. and 3 a.m. Wednesday, although the time was difficult to determine based on the body temperature.
County Coroner Bob Campbell said he would soon learn whether hypothermia was the cause of death. Toxicology tests would take longer.
"The plot thickens, so to speak," Whalen said. "We were surprised at this. We thought we would have something more definitive to go on."
Whalen said there were no suspects, although deputies were interviewing people and did have "people of interest." Anyone with information is asked to call the sheriff's office.
Koberna had lived in Jackson for two years.
(Copyright 2007 by The Associated Press. All Rights Reserved.)