Talking Dateline: Deadly Obsession

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/4qbJuMw Listen to the full episode on Spotify: https://open.spotify.com/episode/6HMXYws6aYPTcCU8W6xVog

Episode 250409 of the Dateline NBC podcast, hosted by NBC News, titled "Talking Dateline: Deadly Obsession" was published on April 9, 2025 and runs 22 minutes.

April 9, 2025 ·22m · Dateline NBC

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Summary

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/4qbJuMw Listen to the full episode on Spotify: https://open.spotify.com/episode/6HMXYws6aYPTcCU8W6xVog

Episode Description

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/4qbJuMw

Listen to the full episode on Spotify: https://open.spotify.com/episode/6HMXYws6aYPTcCU8W6xVog

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