Hello, I'm Keith Morrison from Dateline NBC.

Here's a special preview of our new podcast, The Man in the black mask.

It was a happy habit, the evening walk,

the summer habit of course. Too soon now that crisp white in the air would turn bitter cold.

But not yet.

That day, Friday, October 3rd, had been uncommonly warm for Edmondon, and twilight seemed to linger as they

ambled along the path and wound its way through their neighborhood. It was a good neighborhood, save,

established, not quite grand, but not modest either. So they wandered, the two of

them and listened to parents calling in kids from the park.

Almost dark now.

There!

Out of nowhere, there it was, sudden, shocking, terrifying.

I have never, in my life, felt fear like that.

That is Marissa Guiney, remembering the young man who stumbled out of an alley

and collapsed at their feet. Came right across our path, just kind of fell in front of us.

So stumbling along, yes. Marissa's partner Trevor Hosinger was

alarmed too, but something about it seemed off somehow. And to me that didn't

look real. Look like it was staged.

And what was he doing you're saying or how is he behaving?

He looked at me and said I'm being robbed can you help me?

And it was just an instant bad feeling.

It was like everything in my body just tensed up. I felt bad.

...