Peter Van Sant

is heartbreaking.

I still feel that maybe somebody's holding her and that maybe one day they'll let her go or she'll escape.

But perhaps no story is more mysterious and frightening than this woman's.

Her name is Kathy Kupka, the organizer of the group.

Her sister Christine disappeared.

And by now, Kathy has accepted the sad fact that her missing sister was probably murdered.

What she won't accept, she says, is somebody getting away with that murder.

And Kathy says she knows exactly who it is.

Like, this is so horrible that, you know, I know people try to understand.

Come here.

In 1998, Kathy's sister Christine was 28 years old, a college honors student,

She worked as a waitress.

She had such beautiful long red hair.

And dreamed of becoming a civil rights attorney.

And a lot of freckles on her nose.

Well, she actually tried to scratch them off.

She had a scar on her nose.

Somehow, she still found time to call Kathy every day.

She was such a caller, because she was really a caller, always calling.

I talked to her a million times.