Final autopsy and toxicology results for a Lincoln man found dead in a creek near Pioneers Park last month indicate he died of accidental drowning.

Dustin Jeune’s body was found in Haines Branch Creek Oct. 19 — one month after friends reported him missing.

The Lancaster County Sheriff’s Office identified him two days later, with the help of dental records, after finding ID cards in his pocket.

Lancaster County Sheriff Terry Wagner said contributing factors in Jeune’s death were a blood alcohol of 0.140 percent and the presence of Chlorpheniramine, an antihistamine contained in many over-the-counter cold medications.

“Chlorpheniramine causes drowsiness and alcohol enhances that effect,” Wagner said. “This investigation has determined many young people take cold medications for other than its therapeutic use.

“That may have been the case with Dustin Jeune.”

There is no evidence of foul play in how Jeune, 21, came to be in the creek, Wagner said.

Two of his friends filed a missing person report in September, saying they had gone to “Hippie Cliffs” with Jeune the night of Sept. 19.

They said he got drunk and ran into the trees, saying he wanted to be left alone. They looked for him that night, they said, but could find only his cell phone and hat.

On Oct. 18, two men walking dogs discovered Jeune’s body face down in the creek.

Investigators found a wallet in his pants pocket, along with a learner’s permit and military ID card, according to a search warrant filed in Lancaster County District Court.

Jeune was an avid bowler and a 2006 graduate of Lincoln Southwest High School.

Last month, sheriff’s Investigator Amy Merritt asked a judge for a warrant to get information from Sprint/Nextel, including a call history and cell tower information for Jeune’s phone.

In court records, she said a Lincoln police officer investigating Jeune’s disappearance was told he had sent a text message the night of Sept. 19, telling a woman goodbye.

Wagner said Tuesday phone records are integral in such cases “to give us a picture of the last moments of a person’s life.”

Investigators found no evidence to indicate Jeune had committed suicide, Wagner said.

Jeune was found in 2½ to 3 feet of water, but it may have been deeper when he went in, Wagner said.

Reach Hilary Kindschuh at 473-7120 or hkindschuh@journalstar.com.