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=1000702589964

Vote 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 Cisco 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/43Mj1h6

Listen 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.