(NBC News) — Tonight on “Dateline,” when Florida law professor Dan Markel is found murdered in his garage, the investigation draws national attention and is featured in the podcast “Over My Dead Body.”

Tonight’s two-hour episode reveals the latest developments in the case and an inside look at the trial for the suspects accused of murdering Markel, including the newly released evidence and the bombshell testimony.

Here’s a preview of Dennis Murphy’s report:

It’s the story of a brazen shooting that would stump a team of law enforcement agencies. A saga that “Dateline” has been covering for five years.

JASON NEWLIN: It started as a true whodunit or a why did they do it.

GEORGIA CAPPLEMAN: It’s as cold-blooded a killing as you can get.

It would expose the secrets of a bitter, messy divorce.

JEREMY COHEN: It just didn’t make any sense to me. It seemed totally random.

And ignite a family’s search for justice.

RUTH MARKEL: First shot. Then death. Then murder. You don’t repair from that.

And tonight we have the latest developments in the case, with newly revealed evidence, new details and bombshell testimony.

JEFF LACASSE: After My stomach kind of flipped. It was like a chilling statement.

All of it forming the latest chapter in this explosive tale.

TARA KAWASS: Do you know who killed Dan Markel?

WENDI ADELSON: No.

Catch tonight’s all-new “Dateline” at 9 p.m. on NBC4

About ‘Dateline

“Dateline NBC” is the longest-running series in NBC primetime history and is in its 30th season. Dateline is anchored by Lester Holt and features correspondents Andrea Canning, Josh Mankiewicz, Natalie Morales, Keith Morrison and Dennis Murphy.

Dateline is the #1 Friday newsmagazine and reaches more than 17 million people every week through its broadcast, and millions more through its social media platforms and podcasts.

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.

This past season, Dateline debuted two new podcasts, “Mommy Doomsday” and “Killer Role,” hosted by correspondent Keith Morrison.

In February, NBC also greenlit a straight-to-series inspired by the story featured in the Dateline podcast series, “The Thing About Pam.” Two-time Oscar-winning actress Renee Zellweger will star and executive produce the series, in collaboration with Blumhouse Television, NBC News Studios and Zellweger’s Big Picture Co.