Blayne Alexander and Keith Morrison sit down to talk about his episode “ Under a Full Moon.” Shauna Tiaffay, a cocktail waitress on the Las Vegas strip, was found beaten to death in her home in September 2012. Authorities wondered if the killing was a robbery gone wrong, until they got a tip that changed everything. It turned out that Shauna’s West Point graduate and EMT husband, George Tiaffay, had hired a hitman to carry out the crime. Keith and Blayne discuss how George was an unlikely killer and how his post-trial confession stunned his family. Later, Keith shares an extra clip from his interview with George’s sister. He and Blayne also answer your questions from social media.

Listen to the full episode Under a Full Moon on Apple: https://apple.co/4lYmizk

Listen to the full episode on Spotify: https://open.spotify.com/episode/6GQUTnC0bvj7kYN9iS9dRG

To learn more about Dateline LIVE in Nashville on Sept. 28, and to get tickets, go here:https://www.nbcnews.com/dateline-event

If you or somebody that you know is experiencing domestic violence or relationship abuse, contact the National Domestic Violence Hotline at 800-799-SAFE (7233), text BEGIN to 88788, or visit thehotline.org

A Las Vegas cocktail waitress is found murdered in her home, leading authorities to wonder if there is a predator at large. Keith Morrison reports.

Two of Donna Adelson's children testify this week for the prosecution. In Northern California, a missing woman's husband is indicted for her murder more than a year after she vanished -- and a year and a half after he was indicted on felony domestic violence charges for an alleged attack on her. Plus, a former prosecutor on DNA's uses and pitfalls.

Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

To learn more about Dateline LIVE in Nashville on Sept. 28, and to get tickets, go here: https://www.nbcnews.com/dateline-event

A mother of two vanishes from her home, leading investigators to uncover a disturbing connection between her recent weight loss and her mysterious disappearance. Andrea Canning reports.

Early one frigid morning, in a small rural New York town, a house burns to the ground, and a woman is found dead in the debris. It's called an accident, but is it? Andrea Canning reports.

17 year old Sarah Grace Patrick is accused of gunning down her mother and stepfather in Georgia. The defense team of the man accused of killing UNC Chapel Hill student Faith Hedgepeth in 2012 has filed motions that raise new questions about crime scene evidence. Updates on Florida matriarch Donna Adelson's trial and former MLB pitcher Dan Serafini. Plus, an inside look at police interrogations and the tactics investigators use.

Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

To learn more about Dateline LIVE in Nashville on Sept. 28, and to get tickets, go here: https://www.nbcnews.com/dateline-event

Blayne Alexander sits down with Keith Morrison to talk about his episode, "In a Lonely Place,” about the disappearance of Chris Smith, a California entrepreneur who vanished in June 2010. For months, his family believed he was traveling the world, thanks to a series of convincing emails. But what a sharp-eyed investigator eventually uncovered led to the truth: Chris had been murdered by his business partner, Ed Shin. Blayne and Keith discuss how the case slowly unraveled, and how Keith’s sit-down with Shin behind bars got testy. Keith also shares an extra clip from his interview with investigator Joe Dalu, whose instincts led him to a critical discovery. Have a question for Talking Dateline? DM us on social @DatelineNBC or leave a voicemail at (212) 413-5252. Your message might be featured in an upcoming episode.

Listen to the full episode In a Lonely Place on Apple: https://apple.co/4mUiPCM

Listen to the full episode on Spotify: https://open.spotify.com/episode/4iZOGhLs4h6XEJoc4ysSPj?si=8221d39ac645491d

Listen to the episode “Body of Evidence” Keith mentions as another unusual interview with a killer here on Apple: https://apple.co/4mpEL8Z

Listen to “Body of Evidence” on Spotify: https://open.spotify.com/episode/6xym79PJkeiO5oMzZ8x8w1?si=0fa4d6d5fabd402e

After California entrepreneur Chris Smith abruptly leaves his business, his family initially believes he is traveling the world until the shocking truth comes to light. Keith Morrison reports.