Talking Dateline: Deadly Obsession

Listen to this week's episode of the Dateline: True Crime Weekly podcast with Andrea Canning. In Los Angeles, the trial of Monica Sementilli, who is accused of plotting with her lover to murder her husband, winds down. In Arizona, Lori Vallow Daybell defends herself against charges she conspired to murder her fourth husband. Updates in the Karen Read retrial and Sean Combs' case. Plus, a look at defendants who represent themselves. Find out more about the cases each week here: www.datelinetruecrimeweekly.com. Listen to Andrea’s episode “Deadly Obsession” about the Dana Chandler case here: https://podcasts.apple.com/us/podcast/deadly-obsession/id1464919521?i=1000702589964Vote on the Webby Awards: https://vote.webbyawards.com/PublicVoting#/2025/podcasts/shows/crime-justice

Keith Morrison and Andrea Canning sit down to talk about Andrea’s episode, “Deadly Obsession.” In 2002, Mike Sisco and Karen Harkness were found murdered in Karen’s Topeka, Kansas, home. As the investigation into their deaths unfolded, a suspect emerged with close ties to one of the victims and a history of obsessive behavior.  Andrea and Keith discuss the trail of circumstantial evidence that led to an arrest, followed by three trials. And they discuss the wisdom of a defendant choosing to represent themself at trial. Plus, they answer viewer and listener questions from social media. Have a question for Talking Dateline? Leave it for us in a DM on social media @DatelineNBC or in a voicemail at (212) 413-5252 for a chance to be featured on a future episode!Listen to the full episode of “Deadly Obsession” on Apple: https://apple.co/43Mj1h6Listen to the full episode on Spotify: https://open.spotify.com/episode/6HMXYws6aYPTcCU8W6xVog 

Kansas couple Mike Sisco and Karen Harkness are found dead by their parents before a family fish fry in 2002. A years-long search for evidence and three criminal trials over two decades reveal strained dynamics within one victim’s family. Andrea Canning reports.Keith Morrison and Andrea Canning go behind the scenes of the making of this episode in ‘Talking Dateline’ Listen on Apple: https://apple.co/4lolXXvListen on Spotify: https://open.spotify.com/episode/2wiUTqrU61T5FQXvyMVgfy

Listen to this week's episode of the Dateline: True Crime Weekly with Andrea Canning. In Michigan, the prosecution plays the 911 call from the crime scene — but does it help the defense? In Hawaii, a doctor is charged with attempted murder after allegedly trying to push his wife off a popular trail. What she's told investigators. Jury selection is underway in Karen Read's retrial and finished early in Lori Vallow Daybell's Arizona trial. Plus, best practices for law enforcement on how to interact with people with autism. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com.Domestic violence resources: Call 1-800-799-SAFE, text START to 88788, or visit https://www.thehotline.org/

Michelle Young, pregnant with her second child, was brutally murdered while her husband Jason was away on business. Who could have killed this beloved young mother? Keith Morrison reports. 

When a woman's body is discovered at an Anaheim trash facility, a dedicated detective makes a promise to her mother to get justice. She doesn't know that search will bring her face to face with a serial killer. Keith Morrison reports.Keith Morrison catches up with Julissa Trapp in Dateline’s ‘After the Verdict’ series. They discuss what she’s been up to since appearing on Dateline, including her promotion to sergeant and her interview with the second of the two serial killers featured in the episode.Now with the cold case unit, Sgt. Trapp reveals details about a 40-year-old murder that was recently solved and, as she approaches retirement, tells Keith about the legacy she hopes to leave behind. Available exclusively to Dateline Premium subscribers. https://dateline.supportingcast.fm/listen/dateline-nbc-premium/after-the-verdict-good-evil

Listen to this week's episode of the Dateline: True Crime Weekly podcast with Andrea Canning. A verdict in the trial of a North Dakota woman accused of stabbing her roommate to death with a pocket knife nearly 20 years ago. In Michigan a retrial begins for a woman accused of setting her husband on fire and then running him over with her van. The latest in the Karen Read and Bryan Kohberger cases. Plus, actor Dennis Quaid talks about his experience playing the Happy Face serial killer. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com

Andrea Canning and Josh Mankiewicz sit down to talk about Andrea’s episode "Poison Twist.” In 2017, Katie Conley was convicted of poisoning her boss and ex-boyfriend's mother, Mary Yoder, a beloved chiropractor in upstate NY. But after a stunning development this year, Conley was released from custody. Andrea shares a podcast-exclusive clip of her interview with Conley’s defense attorney, and she and Josh discuss what might be next for Conley. Plus, they dish about their favorite fast food, Andrea’s uncanny ability to spot a Canadian accent, and welcome a special guest, NBC News Legal Analyst Danny Cevallos, to help answer viewer questions.If you have a question for Talking Dateline, send us an audio message on social @datelinenbc or leave us a voicemail at (212) 413-5252.Listen to the full episode of "Poison Twist" on Apple:  https://apple.co/3RoALr6Listen to the full episode on Spotify:  https://open.spotify.com/episode/3ZTbsKa4uQDCgQOyDV6o0h

The death of a beloved chiropractor becomes a criminal investigation when authorities discover she’d been poisoned. Andrea Canning reports on a dramatic update in the case.Andrea Canning and Josh Mankiewicz go behind the scenes of the making of this episode in ‘Talking Dateline’Listen on Apple:  https://apple.co/4j0qfTvListen on Spotify:  https://open.spotify.com/episode/237yte7iDf1d9kkWfOxc70 

Listen to this week's episode of the Dateline: True Crime Weekly podcast with Andrea Canning. Robert Baker, the former lover of Monica Sementilli and admitted killer of her husband, takes the stand in her defense. An alleged vegan cult known as the Zizians will see their leader face trial in Maryland next week. And updates on Karen Read, the University of Pittsburgh student missing in the Dominican Republic, and Lori Vallow Daybell. Plus, everything you need to know about a new scam called pig butchering. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com. Listen to the full Mommy Doomsday podcast series on Apple: https://podcasts.apple.com/us/podcast/mommy-doomsday/id1540849480Listen to the full episode of “Lori Vallow Daybell: The Jailhouse Interview” on Apple: https://apple.co/3FjWD4dListen to the Talking Dateline episode where Keith discusses the interview on Apple: https://podcasts.apple.com/be/podcast/talking-dateline-lori-vallow-daybell-the-jailhouse/id1464919521?i=1000698801101