On the road to visit her boyfriend, 18-year-old Lisa Marie Kimmel

takes a detour right off the map.

By the time it passed two or three days,

I think everybody had a pretty bad feeling that this

was not going to end well. Police fear she ran into something evil on her

eight-hour journey. It's just one long stretch of highway. It's the perfect area to commit any sort of a crime.

When local fishermen reel in a grisly discovery,

everyone's worst fears are realized.

Her last days were probably a living hill.

Only through the relentless work of investigators is the dark secret finally unearthed.

It was like opening a grave.

It was so creepy.

The hair on the back is next to that.

How well do you know your neighbors?

What lies behind the white picket fences. Billings, Montana is an old Western city surrounded by distant peaks and an endless sky.

Under this vast canopy, 18 year old Lisa Marie Kimmel

has plenty of room to reach for the stars.

Lisa was highly motivated and just a very ambitious young woman.

She seemed to really be a 30 year old disguised as a teenager.

As family friend Kay Carpenter knows,

this eldest of three sisters has big plans.

Lisa had a little book that she had put together her dreams and hopes to get married, have children,

...