Dateline NBC “Deadly Obsession” April 4 2025 Recap & Preview

This Friday, April 4, 2025, at 9:00 PM ET/8:00 PM CT, Dateline NBC presents “Deadly Obsession”, a gripping investigation into the 2002 murders of Mike Sisco and his fiancée Karen Harkness in Topeka, Kansas.

What initially seemed like a tragic double homicide quickly unraveled into a tale of obsession, jealousy, and a lengthy pursuit of justice. Mike Sisco’s ex-wife, Dana Chandler, was originally convicted of the murders in 2012, but after a Kansas Supreme Court ruling overturned her conviction, she now faces a retrial. The case has captivated many over the years, with three trials spanning two decades.

Dana and Mike’s turbulent relationship, marked by a bitter divorce and Dana’s obsession with her ex-husband, forms the backdrop of this shocking crime. Prosecutors argue that Dana’s obsessive behavior led her to murder Mike and Karen, while the defense claims the case against her lacks sufficient physical evidence. With limited physical evidence but a long history of tension and strange behavior, Dana’s fate now rests in the hands of the jury.

Dateline correspondent Andrea Canning reports on the years-long search for the truth, the emotional toll on the families, and the drama surrounding Dana Chandler’s second day in court. Tune in for an in-depth look at this high-stakes trial, airing Friday at 9:00 PM ET/8:00 PM CT on NBC.