The following podcast contains dramatizations of actual events.

Certain situations, dialogue, names, and locations may have been changed.

Some scenes are graphic in nature.

Listener discretion is advised.

Up next, this upscale city prided itself on being safe.

It's a very urban area, has a very low crime rate.

That image is shattered when a young graduate student meets a brutal end.

I think we were just tall and disbelieve. We were absolutely crushed.

There's only one witness and she's been wounded.

And all I could think was it was my fault because I lost my...

I cut my wall and...

I couldn't help her.

Security cameras see possible suspects.

Death surveillance, video camera.

Cs two guys, dressed in black.

Looks like they have a mask on.

And one's short.

And one's tall.

But it's what someone hears that upends the case.

There was an argument loud enough that this young woman said, hey, you've come over here

and listen to this. There's something going on next door.

Yeah. Just outside the nation's capital, Bethesda, Maryland is a bedroom community for many people, from the U.S. and all over the world,

...