(NBC News) — Friday on “Dateline,” the crimes and their deadly culmination of the con-man John Meehan, popularized by the podcast “Dirty John.”

Here is a preview of Keith Morrison’s report:

In the beginning was desire. Natural human desire — for connection — for love. And so, she aimed her arrow at that online ocean of intimate strangers. And found — him.

911 OPERATOR: Newport Beach 911. Do you need police fire or paramedics?

CALLER: Hi… I need an ambulance right away. And the police.

It was summer when the awful climax came. A late afternoon. That’s when they heard it.

CALLER: And she says this woman’s just screaming.

911: All right.

There was a man down there, they could see him, he had a knife he was stabbing the screaming woman.  And nobody was helping her.

CALLER: It’s really bad.

911: All right. I understand. We have officers on the way.

Too late. Too late.

CALLER: Oh, the ambulance is here. They’re doing CPR on somebody.

The bloody ending. But the story, the whole terrible tale, is much deeper than that one thing, dreadful though it was.

A story Christopher Goffard of the Los Angeles Times spent months unraveling, strand by disturbing strand.

CHRISTOPHER GOFFARD: It’s a story about — trust, and betrayal, and — it’s a story about family.

About a woman — two protective daughters.  And what those daughters did when the man came into their mother’s life. Before the death in the parking lot.

Watch “Dateline: The Women & Dirty John” Friday at 10 p.m. on NBC4.

About ‘Dateline’

“Dateline NBC” is the longest-running series in NBC primetime history and is in its 32nd season. Dateline is anchored by Lester Holt and features correspondents Andrea Canning, Josh Mankiewicz, Keith Morrison and Dennis Murphy.

The stories range from compelling mysteries to powerful documentaries and in-depth investigations. When major news breaks, they go to the scene, putting the pieces together to bring the viewer the full picture. And in every story they tell, they help the real people who lived the events share their journeys with the viewer.