The Sweetwater County Sheriff's Office is investigating the death of woman that occurred early Tuesday morning. Sweetwater Sheriff's Detective Dick Blust says the investigation is still active, but they do have a witness who saw Storey Ice, 21, of Rock Springs and St. George, Utah, get run over by a pickup.

And, the witness was an on-duty sheriff's deputy.

Sheriff's deputy on patrol:

"Deputy Sheriff Jason Mower was on patrol in the Yellowstone Road area north of Rock Springs at about 1:30 am when he observed a green 2003 Dodge pickup being driven north on Yellowstone in an erratic manner."

Det. Blust says the deputy observed two female passengers in the pickup apparently fighting. The woman in the center seat was later identified as Jaime Shoemaker of Rock Springs. The passenger closest to the door was Storey Ice.

Passenger exits moving vehicle:

"Mower saw the front passenger’s door of the Dodge pickup open suddenly, and a female subject fall out of the truck onto the roadway. The right rear tire of the green Dodge truck then ran over the top of Storey Ice’s upper torso, as described in official documents."

Ice was transported to Sweetwater Memorial Hospital, where she was declared dead.

When asked if the witness being a sheriff's deputy was a help or hindrance to the investigation, Blust said it helps.

Someone saw what happened:

"It's an aide to the investigation because the incident itself was witnessed, by a law enforcement officer."

Det. Blust emphasized that investigation was active so it was too early to speculate what, if any, charges might be filed in connection to the death. The driver of the pickup, Rock Springs resident Brett Sisemore, 34, was arrested at the scene for DUI. He was later freed on a $2,000 bond.