Andre Jackson

Nobody knew where Marie was.

He then took all the kids to his mother's house and dropped them off.

Andre's first stop was the home of Marie's friend, Bridget Harris, whom he'd called earlier.

And then when he showed up is when I got concerned.

I'm like, she's still not back?

Cell phones were still pretty rare in those days.

So I paged her because I knew if I paged, she would immediately call me back.

But Marie did not call back.

The next morning, Andre knocked on the door of another friend, Jean Jones Apfel.

And so you paged her how many times?

By now, it was Saturday, 10.20 a.m.

Marie had been missing for almost 18 hours.

Andre called the Englewood police.

Police started interviewing witnesses, searching the neighborhood.

But the weekend passed with no sign of Marie.

That's when the phone rang on the desk of FBI agent Rick Hadle.

It's unusual for the Bureau to get involved in a missing persons case.

But it turned out that Marie Singleton was no ordinary missing person.

Unbeknownst to just about everyone in her life, Marie Singleton was a code clerk for the Central Intelligence Agency.

She wasn't a spy, but she did handle classified communications from agents overseas, information that might be very interesting to enemies of the United States.