Jennifer vanished sometime in the overnight hours.

Right now there is no trace.

The investigators say evidence leads them to believe that she's dead.

Stick my nose back in that trail. That's all I can do.

This is already gone.

Already gone.

Already gone.

As a missing person's advocate,

I have a soft spot for those long cold missing person's cases.

The ones you don't hear about anymore.

The cases that don't make the news or get headlines.

That most likely don't have a detective looking them over.

Come with me to the Pacific Northwest,

where we explore the 1974 disappearance of a teenage girl,

Laurie Lynn Partridge.

Laurie Lynn, known as Laurie, was born in 1957 to marry in Kenneth Partridge in Santa Monica, California.

She was the oldest of six children, five girls and one boy.

A few years after Laurie's birth, the young family settled in Fountain Valley, California.

As a teenager, Laurie attended Los Amigos High School where she had an active social circle and many friends.

Right before her senior year, Kenneth announced that his job was moving to family from Southern California to Spokane, Washington.

Laurie was crushed.

She was upset to be moving states away from her friends, her longtime boyfriend of three years, and her whole life.

...