Dateline

Was Lars Itzo a grieving husband who made a horrific mistake when he shot wife Debbie Kelly in the chest or a calculated killer? 

She thought it was the vacation of a lifetime, but  Micki Kanesaki would never survive the Italian cruise with her ex-husband. 

He claimed to be a successful doctor, but "Dirty John" Meehan was carrying some dark secrets. 

Ben Novack Jr.'s brutal death would reveal a heartbreaking betrayal and uncover another calculated murder once thought to be an accident.

“You know I felt so loved and I felt so treasured and I felt so worthy and you know at that moment I thought, well, it was all worth it,” suburban mom Toby Young said of her whirlwind romance with convicted killer John Manard.

Did a bitter feud over the Maryland house Scott Horn had loved lead to his death?

Steven Gordon and Franc Cano could still be out on the hunt if it wasn't for one determined investigator, Detective Julissa Trapp.

The night of Dec 13, 2001 would forever change the lives of two Early, Iowa families. 

Its been more than 15 years since Teresa Halbach disappeared on a photography assignment for Auto Trader Magazine, but some still question the convictions of the two men found responsible for her murder. 

Denita Smith believed she had met her "perfect" man, but he was hiding a secret that would cost her life.