Tonight on Dateline. I just see Sante Kimes as the ultimate femme fatale, seducing lovers,

lawyers, husbands, her son. This is someone who gets what she wants. This story about a mother

and son grifter team. This was a diabolical duo.

They seemed what, like open and friendly and interesting?

Yeah, I didn't think they were killers.

We have a woman, a socialite goes missing.

There were several people who disappeared.

She had put a hit out on me. She wanted me killed. Why did she keep

getting away with it? She just had that power over me. That was mom's first protege. I was supposed to be

her co-art and crime. Your mother instructed you to kill people. I only saw one road forward. Sinister.

Scheme.

I felt like I was in the presence of Satan.

They were known as Mommy and Clyde, charming, cunning, ice-cold criminals.

Inside the mother and son tale almost too twisted to believe I'm Lester Holt and this is

Dateline here's Keith Morrison with the Devil War White.

It was evening when they found her, found her prone in her cell at the Bedford Hills Correctional Facility in New York.

A guard raised the alarm and they rushed her to a nearby hospital.

But it was too late.

Her enlarged heart was so badly damaged it could not go on beating.

She was 79 when she died.

Sixteen years past the outrages,

the mayhem,

...