Up next a police officer's life is forever changed by a young woman's murder.

It's as if you live that scene over and over and over again.

There's evidence found with the victim, but no technology to properly test it. The case stalls for nearly two decades until a new

device designed for food safety finally exposes a killer. This was kind of like the nail in the coffin.

It is the most amazing thing I've ever seen in my law enforcement career. Oh, About two weeks before Christmas in 1995 Todd Bonner, a patrolman in Utah's Wasatch County Sheriff's Office, got the kind of call

all policeman dread. A farmer found a corpse next to a river on his property.

This was a body found nude.

You nude deep down in the back of your mind that

this was going to be a different type of a case.

The victim, a female in her late teens,

perhaps her early 20s,

had been beaten to death and left along an isolated stretch of the Provo River.

The scene was very graphic. and knew that she had taken one heck of a beating.

She had suffered quite a bit.

No conventional murder weapon was found at the scene, but it didn't take long to figure out what had been used to kill this young woman.

Six bloody rocks were found near the body.

The rocks ranged in different sizes.

We did come across one, I don't want to say it was a small rock, but it was small enough that you could grab hold of it with your hand and it appeared to have a hand print or fingerprint.

The rocks told detectives straight away that they were dealing with what's known as a crime of opportunity.

For whatever reason, whatever motivated that he grabbed the nearest thing that he thought

he could kill someone with and just beat her for a considerable period of time

until she died.

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