OMAHA, Neb. (WOWT) - Officers tracking down a driver who left the scene of a December crash that left a pedestrian unconscious ended up investigating a very different sort of crime.

Edwin Udhus was arrested Monday and booked on 12 felony counts of child pornography possession. He is also charged with second-degree assault and failure to stop and render aid for serious injury as the result of the hit-and-run pedestrian crash reported months earlier.

About 9:30 p.m. Friday Dec. 15, Omaha Police responded to a report of someone struck by a vehicle crash near Roberts Park, north of 78th and Dodge Streets. The victim was left lying unconscious, records state.

Witnesses described the driver to police and said they had snapped a photo of the license plate of the vehicle as it left the scene.

OPD traced the vehicle to an address, and ultimately to a suspect who told officers that he had been at the park for a memorial balloon release and “freaked out” and left after hitting the person, according to police records.

Officers asked Udhus whether he had taken any pictures of the event. He said he did, so OPD took his phone into evidence, the report states.

Obtaining a warrant the next day, investigators looked at the phone images and found 12 photos — and multiple copies of them — that appeared to be prepubescent youth engaged in sexual poses and acts, some with other juveniles.

According to police records, he had used an application called Keepsafe to lock down the images in an effort to obscure them and had changed the file extensions on some of the images in order to make them appear to be text files.

Udhus waived his preliminary hearing in January on the traffic case, which is currently working its way through district court. He has not yet appeared in court on the more recent charges.