Lester Holt

And, Keith, this is a case I know you have been covering for years, and it brings us back to Baytown, Texas, where the death of Sarah Hartsfield's husband, Joe, ultimately exposed a much darker story.

Multiple marriages, volatile relationships, and allegations of violence that stretch back for decades.

The episode is called The Trouble with Sarah.

And, folks, if you haven't listened to the episode...

You can find it in the Dateline podcast feed or stream it on Peacock.

So go there and listen to that.

When you come back, Keith has some extra sound for us from private investigator Lynn Marie Garcia, who describes a surprising request she says that Sarah made after her conviction.

And later, Keith will answer your questions from social media.

So, OK, let's start talking Dateline.

Keith, just give us the overview, your view of this story.

It's still relatively rare that we see women as perpetrators in cases like this.

You've covered a few, though.

Lori Vallow, Pam Hupp, Sarah Hartsfield.

Is this your specialty?

Is this something you're able to look and... It seems like it's becoming one.

It seems a little blunt.

Yeah, it's because this idea that Sarah has this, somehow this pull over men.

Can you describe what it was about her that made her so appealing?

When investigators look at Sarah's early relationships, they see the same cycle repeating, essentially.

Intense, very intense emotional beginnings, followed by deception, and then chaos once the relationship starts to fall apart.