Inside the defense of Florida grandmother Donna Adelson. In Long Island, a judge's ruling on DNA ahead of alleged Gilgo Beach serial killer, Rex Heuermann's, murder trial. Plus, almost 21 years after her daughter was murdered, a mother hits the road to bring awareness to the unsolved case.

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.

Blayne Alexander and Keith Morrison go behind the scenes of the making of this episode in ‘Talking Dateline’

Listen on Apple: https://apple.co/46k2MbG

Listen on Spotify: https://open.spotify.com/episode/7g0KGFL590nFZYFTg7KMoU