In Georgia, a breakthrough in a 19-year-old amusement park murder. In Philadelphia, the murder of aspiring pageant queen Kada Scott leads to questions for police and prosecutors. Plus, a police precinct in Canada using documentaries to solve cold cases -- including a baby's mysterious death.

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

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Lester Holt sits down with Blayne Alexander to discuss her latest episode, “A Perfect Spring Morning.” Leslie Preer was found brutally murdered in her Chevy Chase, Maryland, home in May of 2001. Her husband, Sandy, was investigators’ prime suspect until DNA cleared him and the case went cold. After more than 20 years of persistence fromLauren Preer, the couple’s only child, detectives caught Leslie’s killer: Lauren’s ex-boyfriend from high school, Eugene Gligor. Blayne tells Lester about the lasting effects both the crime and the lengthy investigation had on Lauren and Sandy and shares how a new set of eyes on the case made all the difference. Later, Blayne shares a podcast-exclusive clip ofLeslie’s brother Bill Jennings speaking at Gligor’s sentencing. Plus, Blayne and Lester answer viewer and listener questions.

Have a question for Talking Dateline? DM us a video to @DatelineNBC or leave a voicemail at (212) 413-5252. Your question may be featured in an upcoming episode.

Listen to the full episode of “A Perfect Spring Morning” on Apple: https://apple.co/3J67KjH

Listen on Spotify: https://open.spotify.com/episode/0q1RPIDq1rMJE5u1GrRJH2

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Quiet Chevy Chase, Maryland, is shaken when wife and mother Leslie Preer is found murdered in her shower. The case goes cold until a surprising lead unmasks the killer. Blayne Alexander reports.

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Andrea Canning sits down with the creator and lead actors from Peacock's new original limited series, "Devil in Disguise: John Wayne Gacy" to talk about making a new kind of true crime drama. One that focuses on the victims, the victims' families, and the detectives who never gave up on their mission to bring the victims home.

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Dennis Murphy drops by to talk about the latest in the case of Mark Sievers, sentenced to death for murdering his doctor wife. He is trying to convince a judge to give him a new trial. A pre-trial hearing for the model and social media influencer who says she fatally stabbed her boyfriend in self-defense. Plus, you've heard of serial killer John Wayne Gacy — but what do you know about his victims? A new drama series from Peacock takes a closer look.

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

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Lester Holt talks with Josh Mankiewicz about his episode, “The Prince, The Whiz Kid, & The Millionaire.” After retired art dealer and Palm Springs socialite Cliff Lambert vanished in 2008, investigators uncovered a plot by a group of grifters that ended in murder. Lester and Josh discuss the mistakes the killers made leading up to their arrests and are joined by Dateline producer David Ketterling to talk about how he captured the essence of Palm Springs on camera. They play a podcast-exclusive clip from an interview with an opera singer who had a run in with one of the conspirators and discuss the pros of doing interviews in cars. Plus, they answer your questions from social media.

Listen to the full episode of “The Prince, The Whiz Kid, & The Millionaire” on Apple: https://apple.co/46Pk4hk

Listen on Spotify: https://open.spotify.com/episode/1AEZRIusS9zJoxkahTV6KJ

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Josh Mankiewicz reports on the disappearance of a retired art collector and Palm Springs socialite, one of the longest and most expensive missing-persons investigations in California history.

Lester Holt and Josh Mankiewicz go behind the scenes of the making of this episode in ‘Talking Dateline’

Listen on Apple: https://apple.co/3KRANrJ

Listen on Spotify: https://open.spotify.com/episode/14LQbM2c3BfJKWavoNBzcm

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When 2-year-old Nikki is rushed to a Texas hospital and doesn’t survive, her father, Robert Roberson, is accused of causing her death. Prosecutors say he shook and beat her in a case of "shaken baby syndrome."

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