Lester Holt

Tenon suddenly had his own doubts about what he'd confessed to.

What's going on?

Yep.

When Tennant withdrew his plea, that gave Mario Fernandez's defense an opening.

You attended a hearing in Florida about that.

Explain what was going on there.

An example the defense brought up is that in his signed confession, Tennant said Mario drove the truck at the scene of the murder.

But without Tennant's testimony, nothing else ties Mario to the truck and the scene of the crime.

So what's all this mean for Shanna Gardner?

Well, a lot of moving parts there, Mike.

Thanks for updating us.

Thanks, Lester.

Up next, it's time for Dateline Roundup.

Updates on the case of the alleged Gilgo Beach serial killer and a verdict in the sex trafficking trial of two real estate brothers.

Plus, I'm joined by Josh Mankiewicz to discuss his new podcast series, Trace of Suspicion.

Welcome back.

Joining me for this week's Roundup is Dateline producer Mario Garcia.

Mario, good to see you.

Thanks for having me, Lester.

For our first story, we're heading to Suffolk County, New York, in a story you know well.