Up next, a college girl goes missing and police suspect murder.

A cryptic text message provides a salacious clue.

And that was code for sex.

Shanaigan's a sex.

In the back of my mind, I think I knew that something wrong had happened.

The victim's boyfriend had a shady past,

whether they had a relationship.

And he also had a history of sex offense.

Despite some blood evidence, police can't find the girl's body,

which raises even more questions.

Without anything pointing us to her,

I don't think we will ever find her.

Many students at the University of Nebraska

work during the school year to pay for living expenses or even tuition.

19-year-old Jessica O'Grady worked as a waitress in a local stake restaurant.

Her goal was to pursue a career in childcare.

She started out as a social studies major,

and then she worked at a daycare also,

and so the more she worked there, the more she realized that she loved kids

and had a passion for it and decided that she wanted to be a teacher.

As her sophomore year was coming to an end,

Jessica celebrated with friends while making plans for the summer vacation.

...