(NBC News) — On a new Thursday “Dateline,” when a United States Air Force airman is shot multiple times inside his garage, a trail of clues leads Las Vegas detectives to a secret love affair and a murderous plan.

Here is a preview of Keith Morrison’s report:

DETECTIVE TOD WILLIAMS: Every bad guy that’s ever lived has come through Vegas at one point in his career.

As a homicide detective for Las Vegas Metro PD In Nevada, Tod Williams saw it all.

TOD WILLIAMS: Whether you’re a plumber or a policeman, you wanna go where the work is. And there’s lots of good police work here in Las Vegas.

KEITH MORRISON: That’s certainly one way to look at it.

Williams did the work for 30 years, never once sharing his cases with the media.

DETECTIVE TOD WILLIAMS: I’ve always refused these.


DETECTIVE TOD WILLIAMS: I just didn’t feel like murder was entertainment or should be entertainment. That’s the best way I could describe it. So, I’ve got my reasons for doing this now.

Reasons that perhaps will make sense once you hear the whole story.

Which began — for Tod Williams — on a cold, December night in 2010 in a family home on a quiet street, 13 miles — and a world away — from the Las Vegas Strip.

CALLER: Oh my God, please.

911: What’s going on there?

Where horror had just come to call.

WIFE: My husband — he just walked in the garage. He’s bleeding.

911: I need you to calm down, just a little bit.

WIFE: Oh my God.

Watch “Dateline: Part of the Plan,” Thursday 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.