A young woman just landed her first big modeling job.

A few hours later, she disappeared.

The weave pattern on some fabric,

the mixture of some concrete and the dog hair

were the keys to the mystery.

It was a Friday night in Central Illinois,

around 10 p.m. A motorist saw an abandoned car

along the side of the road.

The driver's side door was open, the lights were still on.

The engine was running, but there was no one inside.

The first was inside the car.

The inside of the vehicle was a little bit disheveled.

It appeared to be a little bit suspicious.

There was no identification in the purse.

The car's license plate number was registered to David Swan,

a 34-year-old employee of the local newspaper.

When police called Swan, he said his girlfriend,

Karen Slowver, had borrowed his car that night

to pick up her three-year-old son, Christopher,

who had spent the day with his grandparents.

But the car was nowhere near the grandparents' home.

It was 40 miles away, facing in a different direction.

...