Up next, three college students are murdered.

It looks as if one person had killed them all.

He picked on young women, picked on pretty women.

Police immediately have a suspect.

In law enforcement terms, it's almost like winning the lottery.

But not everyone was convinced he was the one.

If he's gonna brag about three, why not four?

He mentioned all the other cases, but never mentioned Susan Schumann.

For 20 years, questions remained.

Until decades old evidence reveals the terrible truth.

It's a horrifying thing to think that there's more than one monster in your community at one time.

It was a week before the fall semester began in 1981.

Susan Schumann moved back to the campus of Southern Illinois University at Kampus.

She was an anxious to start her senior year.

She had just gotten a job at the radio station, and she was going to be doing some of the broadcast work.

There she made a selection tree, a description, narration, and dialogue.

On August 17, Susan left the radio station just before 6 p.m.

She planned to meet her girlfriend for dinner.

But she never arrived.

The friend who she was supposed to have supper with called her roommate Mary.

Mary did not know where she was at.

Later into the night approaching midnight, they started calling all their friends.

...